0132_0213_2103_2310
Counting sequence:
1, 1, 2, 6, 20, 61, 157, 349, 693, 1262, 2148, 3464, 5346, 7955, 11479, 16135, 22171, 29868, 39542, 51546, 66272, 84153, 105665, 131329, 161713, 197434, 239160, 287612, 343566, 407855, 481371, 565067, 659959, 767128, 887722, 1022958, 1174124, 1342581, 1529765, 1737189, 1966445, 2219206, 2497228, 2802352, 3136506, 3501707, 3900063, 4333775, 4805139, 5316548, 5870494, 6469570, 7116472, 7814001, 8565065, 9372681, 10239977, 11170194, 12166688, 13232932, 14372518, 15589159, 16886691, 18269075, 19740399, 21304880, 22966866, 24730838, 26601412, 28583341, 30681517, 32900973, 35246885, 37724574, 40339508, 43097304, 46003730, 49064707, 52286311, 55674775, 59236491, 62978012, 66906054, 71027498, 75349392, 79878953, 84623569, 89590801, 94788385, 100224234, 105906440, 111843276, 118043198, 124514847, 131267051, 138308827, 145649383, 153298120, 161264634, 169558718, 178190364
Generating function in Maple syntax:
(x^7-4*x^6+9*x^4-11*x^3+11*x^2-5*x+1)/(x-1)^6
Generating function in latex syntax:
\frac{x^{7}-4 x^{6}+9 x^{4}-11 x^{3}+11 x^{2}-5 x +1}{\left(x -1\right)^{6}}
Generating function in sympy syntax:
(x**7 - 4*x**6 + 9*x**4 - 11*x**3 + 11*x**2 - 5*x + 1)/(x - 1)**6
Implicit equation for the generating function in Maple syntax:
-(x-1)^6*F(x)+x^7-4*x^6+9*x^4-11*x^3+11*x^2-5*x+1 = 0
Implicit equation for the generating function in latex syntax:
-\left(x -1\right)^{6} F \! \left(x \right)+x^{7}-4 x^{6}+9 x^{4}-11 x^{3}+11 x^{2}-5 x +1 = 0
Explicit closed form in Maple syntax:
piecewise(Or(n = 0,n = 1),1,-1-n^3+19/8*n^2-31/60*n+1/60*n^5+1/8*n^4)
Explicit closed form in latex syntax:
\left\{\begin{array}{cc}1 & n =0\text{ or } n =1 \\ -1-n^{3}+\frac{19}{8} n^{2}-\frac{31}{60} n +\frac{1}{60} n^{5}+\frac{1}{8} n^{4} & \mathit{\text{otherwise}} \end{array}\right.
Recurrence in maple format:
a(0) = 1
a(1) = 1
a(2) = 2
a(3) = 6
a(4) = 20
a(5) = 61
a(6) = 157
a(7) = 349
a(n) = 1/120*(-1+n)*(2*n^4+17*n^3-103*n^2+182*n+120), n >= 8
Recurrence in latex format:
a \! \left(0\right) = 1
a \! \left(1\right) = 1
a \! \left(2\right) = 2
a \! \left(3\right) = 6
a \! \left(4\right) = 20
a \! \left(5\right) = 61
a \! \left(6\right) = 157
a \! \left(7\right) = 349
a \! \left(n \right) = \frac{\left(-1+n \right) \left(2 n^{4}+17 n^{3}-103 n^{2}+182 n +120\right)}{120}, \quad n \geq 8
Specification 1
Strategy pack name: point_placements
Tree: http://permpal.com/tree/15297/
System of equations in Maple syntax:
F[0,x] = F[1,x]+F[2,x]
F[1,x] = 1
F[2,x] = F[3,x]
F[3,x] = F[4,x]*F[5,x]
F[4,x] = x
F[5,x] = F[18,x]+F[6,x]
F[6,x] = F[1,x]+F[7,x]
F[7,x] = F[8,x]
F[8,x] = F[4,x]*F[9,x]
F[9,x] = F[10,x]+F[13,x]
F[10,x] = F[1,x]+F[11,x]
F[11,x] = F[12,x]
F[12,x] = F[10,x]*F[4,x]
F[13,x] = F[14,x]+F[7,x]
F[14,x] = F[15,x]
F[15,x] = F[16,x]*F[4,x]
F[16,x] = F[11,x]+F[17,x]
F[17,x] = F[15,x]
F[18,x] = F[19,x]+F[2,x]
F[19,x] = F[20,x]+F[21,x]+F[63,x]
F[20,x] = 0
F[21,x] = F[22,x]*F[4,x]
F[22,x] = F[23,x]+F[43,x]
F[23,x] = F[24,x]+F[7,x]
F[24,x] = F[20,x]+F[25,x]+F[35,x]
F[25,x] = F[26,x]*F[4,x]
F[26,x] = F[27,x]+F[30,x]
F[27,x] = F[11,x]+F[28,x]
F[28,x] = F[29,x]
F[29,x] = F[27,x]*F[4,x]
F[30,x] = F[14,x]+F[31,x]
F[31,x] = F[32,x]
F[32,x] = F[33,x]*F[4,x]
F[33,x] = F[17,x]+F[34,x]
F[34,x] = F[32,x]
F[35,x] = F[36,x]*F[4,x]
F[36,x] = F[16,x]+F[37,x]
F[37,x] = F[38,x]+F[39,x]
F[38,x] = F[20,x]+F[29,x]+F[35,x]
F[39,x] = F[40,x]
F[40,x] = F[4,x]*F[41,x]
F[41,x] = F[28,x]+F[42,x]
F[42,x] = F[40,x]
F[43,x] = F[44,x]+F[48,x]
F[44,x] = F[45,x]
F[45,x] = F[4,x]*F[46,x]
F[46,x] = F[16,x]+F[47,x]
F[47,x] = F[45,x]
F[48,x] = 2*F[20,x]+F[49,x]+F[60,x]
F[49,x] = F[4,x]*F[50,x]
F[50,x] = F[51,x]+F[54,x]
F[51,x] = F[17,x]+F[52,x]
F[52,x] = F[53,x]
F[53,x] = F[4,x]*F[51,x]
F[54,x] = F[55,x]+F[56,x]
F[55,x] = F[40,x]
F[56,x] = F[57,x]
F[57,x] = F[4,x]*F[58,x]
F[58,x] = F[42,x]+F[59,x]
F[59,x] = F[57,x]
F[60,x] = F[4,x]*F[61,x]
F[61,x] = F[41,x]+F[62,x]
F[62,x] = F[60,x]
F[63,x] = F[4,x]*F[64,x]
F[64,x] = F[65,x]+F[71,x]
F[65,x] = F[11,x]+F[66,x]
F[66,x] = F[20,x]+F[67,x]+F[70,x]
F[67,x] = F[4,x]*F[68,x]
F[68,x] = F[11,x]+F[69,x]
F[69,x] = F[15,x]+F[20,x]+F[29,x]
F[70,x] = F[4,x]*F[65,x]
F[71,x] = F[72,x]+F[75,x]
F[72,x] = F[20,x]+F[63,x]+F[73,x]
F[73,x] = F[4,x]*F[74,x]
F[74,x] = F[38,x]+F[7,x]
F[75,x] = 2*F[20,x]+F[76,x]+F[79,x]
F[76,x] = F[4,x]*F[77,x]
F[77,x] = F[14,x]+F[78,x]
F[78,x] = F[40,x]
F[79,x] = F[4,x]*F[80,x]
F[80,x] = F[28,x]+F[81,x]
F[81,x] = 2*F[20,x]+F[79,x]+F[82,x]
F[82,x] = F[4,x]*F[83,x]
F[83,x] = F[17,x]+F[84,x]
F[84,x] = F[40,x]
System of equations in latex syntax:
F_{0}\! \left(x \right) = F_{1}\! \left(x \right)+F_{2}\! \left(x \right)
F_{1}\! \left(x \right) = 1
F_{2}\! \left(x \right) = F_{3}\! \left(x \right)
F_{3}\! \left(x \right) = F_{4}\! \left(x \right) F_{5}\! \left(x \right)
F_{4}\! \left(x \right) = x
F_{5}\! \left(x \right) = F_{18}\! \left(x \right)+F_{6}\! \left(x \right)
F_{6}\! \left(x \right) = F_{1}\! \left(x \right)+F_{7}\! \left(x \right)
F_{7}\! \left(x \right) = F_{8}\! \left(x \right)
F_{8}\! \left(x \right) = F_{4}\! \left(x \right) F_{9}\! \left(x \right)
F_{9}\! \left(x \right) = F_{10}\! \left(x \right)+F_{13}\! \left(x \right)
F_{10}\! \left(x \right) = F_{1}\! \left(x \right)+F_{11}\! \left(x \right)
F_{11}\! \left(x \right) = F_{12}\! \left(x \right)
F_{12}\! \left(x \right) = F_{10}\! \left(x \right) F_{4}\! \left(x \right)
F_{13}\! \left(x \right) = F_{14}\! \left(x \right)+F_{7}\! \left(x \right)
F_{14}\! \left(x \right) = F_{15}\! \left(x \right)
F_{15}\! \left(x \right) = F_{16}\! \left(x \right) F_{4}\! \left(x \right)
F_{16}\! \left(x \right) = F_{11}\! \left(x \right)+F_{17}\! \left(x \right)
F_{17}\! \left(x \right) = F_{15}\! \left(x \right)
F_{18}\! \left(x \right) = F_{19}\! \left(x \right)+F_{2}\! \left(x \right)
F_{19}\! \left(x \right) = F_{20}\! \left(x \right)+F_{21}\! \left(x \right)+F_{63}\! \left(x \right)
F_{20}\! \left(x \right) = 0
F_{21}\! \left(x \right) = F_{22}\! \left(x \right) F_{4}\! \left(x \right)
F_{22}\! \left(x \right) = F_{23}\! \left(x \right)+F_{43}\! \left(x \right)
F_{23}\! \left(x \right) = F_{24}\! \left(x \right)+F_{7}\! \left(x \right)
F_{24}\! \left(x \right) = F_{20}\! \left(x \right)+F_{25}\! \left(x \right)+F_{35}\! \left(x \right)
F_{25}\! \left(x \right) = F_{26}\! \left(x \right) F_{4}\! \left(x \right)
F_{26}\! \left(x \right) = F_{27}\! \left(x \right)+F_{30}\! \left(x \right)
F_{27}\! \left(x \right) = F_{11}\! \left(x \right)+F_{28}\! \left(x \right)
F_{28}\! \left(x \right) = F_{29}\! \left(x \right)
F_{29}\! \left(x \right) = F_{27}\! \left(x \right) F_{4}\! \left(x \right)
F_{30}\! \left(x \right) = F_{14}\! \left(x \right)+F_{31}\! \left(x \right)
F_{31}\! \left(x \right) = F_{32}\! \left(x \right)
F_{32}\! \left(x \right) = F_{33}\! \left(x \right) F_{4}\! \left(x \right)
F_{33}\! \left(x \right) = F_{17}\! \left(x \right)+F_{34}\! \left(x \right)
F_{34}\! \left(x \right) = F_{32}\! \left(x \right)
F_{35}\! \left(x \right) = F_{36}\! \left(x \right) F_{4}\! \left(x \right)
F_{36}\! \left(x \right) = F_{16}\! \left(x \right)+F_{37}\! \left(x \right)
F_{37}\! \left(x \right) = F_{38}\! \left(x \right)+F_{39}\! \left(x \right)
F_{38}\! \left(x \right) = F_{20}\! \left(x \right)+F_{29}\! \left(x \right)+F_{35}\! \left(x \right)
F_{39}\! \left(x \right) = F_{40}\! \left(x \right)
F_{40}\! \left(x \right) = F_{4}\! \left(x \right) F_{41}\! \left(x \right)
F_{41}\! \left(x \right) = F_{28}\! \left(x \right)+F_{42}\! \left(x \right)
F_{42}\! \left(x \right) = F_{40}\! \left(x \right)
F_{43}\! \left(x \right) = F_{44}\! \left(x \right)+F_{48}\! \left(x \right)
F_{44}\! \left(x \right) = F_{45}\! \left(x \right)
F_{45}\! \left(x \right) = F_{4}\! \left(x \right) F_{46}\! \left(x \right)
F_{46}\! \left(x \right) = F_{16}\! \left(x \right)+F_{47}\! \left(x \right)
F_{47}\! \left(x \right) = F_{45}\! \left(x \right)
F_{48}\! \left(x \right) = 2 F_{20}\! \left(x \right)+F_{49}\! \left(x \right)+F_{60}\! \left(x \right)
F_{49}\! \left(x \right) = F_{4}\! \left(x \right) F_{50}\! \left(x \right)
F_{50}\! \left(x \right) = F_{51}\! \left(x \right)+F_{54}\! \left(x \right)
F_{51}\! \left(x \right) = F_{17}\! \left(x \right)+F_{52}\! \left(x \right)
F_{52}\! \left(x \right) = F_{53}\! \left(x \right)
F_{53}\! \left(x \right) = F_{4}\! \left(x \right) F_{51}\! \left(x \right)
F_{54}\! \left(x \right) = F_{55}\! \left(x \right)+F_{56}\! \left(x \right)
F_{55}\! \left(x \right) = F_{40}\! \left(x \right)
F_{56}\! \left(x \right) = F_{57}\! \left(x \right)
F_{57}\! \left(x \right) = F_{4}\! \left(x \right) F_{58}\! \left(x \right)
F_{58}\! \left(x \right) = F_{42}\! \left(x \right)+F_{59}\! \left(x \right)
F_{59}\! \left(x \right) = F_{57}\! \left(x \right)
F_{60}\! \left(x \right) = F_{4}\! \left(x \right) F_{61}\! \left(x \right)
F_{61}\! \left(x \right) = F_{41}\! \left(x \right)+F_{62}\! \left(x \right)
F_{62}\! \left(x \right) = F_{60}\! \left(x \right)
F_{63}\! \left(x \right) = F_{4}\! \left(x \right) F_{64}\! \left(x \right)
F_{64}\! \left(x \right) = F_{65}\! \left(x \right)+F_{71}\! \left(x \right)
F_{65}\! \left(x \right) = F_{11}\! \left(x \right)+F_{66}\! \left(x \right)
F_{66}\! \left(x \right) = F_{20}\! \left(x \right)+F_{67}\! \left(x \right)+F_{70}\! \left(x \right)
F_{67}\! \left(x \right) = F_{4}\! \left(x \right) F_{68}\! \left(x \right)
F_{68}\! \left(x \right) = F_{11}\! \left(x \right)+F_{69}\! \left(x \right)
F_{69}\! \left(x \right) = F_{15}\! \left(x \right)+F_{20}\! \left(x \right)+F_{29}\! \left(x \right)
F_{70}\! \left(x \right) = F_{4}\! \left(x \right) F_{65}\! \left(x \right)
F_{71}\! \left(x \right) = F_{72}\! \left(x \right)+F_{75}\! \left(x \right)
F_{72}\! \left(x \right) = F_{20}\! \left(x \right)+F_{63}\! \left(x \right)+F_{73}\! \left(x \right)
F_{73}\! \left(x \right) = F_{4}\! \left(x \right) F_{74}\! \left(x \right)
F_{74}\! \left(x \right) = F_{38}\! \left(x \right)+F_{7}\! \left(x \right)
F_{75}\! \left(x \right) = 2 F_{20}\! \left(x \right)+F_{76}\! \left(x \right)+F_{79}\! \left(x \right)
F_{76}\! \left(x \right) = F_{4}\! \left(x \right) F_{77}\! \left(x \right)
F_{77}\! \left(x \right) = F_{14}\! \left(x \right)+F_{78}\! \left(x \right)
F_{78}\! \left(x \right) = F_{40}\! \left(x \right)
F_{79}\! \left(x \right) = F_{4}\! \left(x \right) F_{80}\! \left(x \right)
F_{80}\! \left(x \right) = F_{28}\! \left(x \right)+F_{81}\! \left(x \right)
F_{81}\! \left(x \right) = 2 F_{20}\! \left(x \right)+F_{79}\! \left(x \right)+F_{82}\! \left(x \right)
F_{82}\! \left(x \right) = F_{4}\! \left(x \right) F_{83}\! \left(x \right)
F_{83}\! \left(x \right) = F_{17}\! \left(x \right)+F_{84}\! \left(x \right)
F_{84}\! \left(x \right) = F_{40}\! \left(x \right)
System of equations in sympy syntax:
Eq(F_0(x), F_1(x) + F_2(x))
Eq(F_1(x), 1)
Eq(F_2(x), F_3(x))
Eq(F_3(x), F_4(x)*F_5(x))
Eq(F_4(x), x)
Eq(F_5(x), F_18(x) + F_6(x))
Eq(F_6(x), F_1(x) + F_7(x))
Eq(F_7(x), F_8(x))
Eq(F_8(x), F_4(x)*F_9(x))
Eq(F_9(x), F_10(x) + F_13(x))
Eq(F_10(x), F_1(x) + F_11(x))
Eq(F_11(x), F_12(x))
Eq(F_12(x), F_10(x)*F_4(x))
Eq(F_13(x), F_14(x) + F_7(x))
Eq(F_14(x), F_15(x))
Eq(F_15(x), F_16(x)*F_4(x))
Eq(F_16(x), F_11(x) + F_17(x))
Eq(F_17(x), F_15(x))
Eq(F_18(x), F_19(x) + F_2(x))
Eq(F_19(x), F_20(x) + F_21(x) + F_63(x))
Eq(F_20(x), 0)
Eq(F_21(x), F_22(x)*F_4(x))
Eq(F_22(x), F_23(x) + F_43(x))
Eq(F_23(x), F_24(x) + F_7(x))
Eq(F_24(x), F_20(x) + F_25(x) + F_35(x))
Eq(F_25(x), F_26(x)*F_4(x))
Eq(F_26(x), F_27(x) + F_30(x))
Eq(F_27(x), F_11(x) + F_28(x))
Eq(F_28(x), F_29(x))
Eq(F_29(x), F_27(x)*F_4(x))
Eq(F_30(x), F_14(x) + F_31(x))
Eq(F_31(x), F_32(x))
Eq(F_32(x), F_33(x)*F_4(x))
Eq(F_33(x), F_17(x) + F_34(x))
Eq(F_34(x), F_32(x))
Eq(F_35(x), F_36(x)*F_4(x))
Eq(F_36(x), F_16(x) + F_37(x))
Eq(F_37(x), F_38(x) + F_39(x))
Eq(F_38(x), F_20(x) + F_29(x) + F_35(x))
Eq(F_39(x), F_40(x))
Eq(F_40(x), F_4(x)*F_41(x))
Eq(F_41(x), F_28(x) + F_42(x))
Eq(F_42(x), F_40(x))
Eq(F_43(x), F_44(x) + F_48(x))
Eq(F_44(x), F_45(x))
Eq(F_45(x), F_4(x)*F_46(x))
Eq(F_46(x), F_16(x) + F_47(x))
Eq(F_47(x), F_45(x))
Eq(F_48(x), 2*F_20(x) + F_49(x) + F_60(x))
Eq(F_49(x), F_4(x)*F_50(x))
Eq(F_50(x), F_51(x) + F_54(x))
Eq(F_51(x), F_17(x) + F_52(x))
Eq(F_52(x), F_53(x))
Eq(F_53(x), F_4(x)*F_51(x))
Eq(F_54(x), F_55(x) + F_56(x))
Eq(F_55(x), F_40(x))
Eq(F_56(x), F_57(x))
Eq(F_57(x), F_4(x)*F_58(x))
Eq(F_58(x), F_42(x) + F_59(x))
Eq(F_59(x), F_57(x))
Eq(F_60(x), F_4(x)*F_61(x))
Eq(F_61(x), F_41(x) + F_62(x))
Eq(F_62(x), F_60(x))
Eq(F_63(x), F_4(x)*F_64(x))
Eq(F_64(x), F_65(x) + F_71(x))
Eq(F_65(x), F_11(x) + F_66(x))
Eq(F_66(x), F_20(x) + F_67(x) + F_70(x))
Eq(F_67(x), F_4(x)*F_68(x))
Eq(F_68(x), F_11(x) + F_69(x))
Eq(F_69(x), F_15(x) + F_20(x) + F_29(x))
Eq(F_70(x), F_4(x)*F_65(x))
Eq(F_71(x), F_72(x) + F_75(x))
Eq(F_72(x), F_20(x) + F_63(x) + F_73(x))
Eq(F_73(x), F_4(x)*F_74(x))
Eq(F_74(x), F_38(x) + F_7(x))
Eq(F_75(x), 2*F_20(x) + F_76(x) + F_79(x))
Eq(F_76(x), F_4(x)*F_77(x))
Eq(F_77(x), F_14(x) + F_78(x))
Eq(F_78(x), F_40(x))
Eq(F_79(x), F_4(x)*F_80(x))
Eq(F_80(x), F_28(x) + F_81(x))
Eq(F_81(x), 2*F_20(x) + F_79(x) + F_82(x))
Eq(F_82(x), F_4(x)*F_83(x))
Eq(F_83(x), F_17(x) + F_84(x))
Eq(F_84(x), F_40(x))
Pack JSON:
{"expansion_strats": [[{"class_module": "tilings.strategies.requirement_insertion", "extra_basis": [], "ignore_parent": false, "maxreqlen": 1, "one_cell_only": false, "strategy_class": "CellInsertionFactory"}, {"class_module": "tilings.strategies.requirement_placement", "dirs": [0, 1, 2, 3], "ignore_parent": false, "partial": false, "point_only": false, "strategy_class": "PatternPlacementFactory"}]], "inferral_strats": [{"class_module": "tilings.strategies.row_and_col_separation", "ignore_parent": true, "inferrable": true, "possibly_empty": false, "strategy_class": "RowColumnSeparationStrategy", "workable": true}, {"class_module": "tilings.strategies.obstruction_inferral", "strategy_class": "ObstructionTransitivityFactory"}], "initial_strats": [{"class_module": "tilings.strategies.factor", "ignore_parent": true, "interleaving": null, "strategy_class": "FactorFactory", "tracked": false, "unions": false, "workable": true}], "iterative": false, "name": "point_placements", "symmetries": [], "ver_strats": [{"class_module": "tilings.strategies.verification", "strategy_class": "BasicVerificationStrategy"}, {"class_module": "tilings.strategies.verification", "ignore_parent": false, "strategy_class": "InsertionEncodingVerificationStrategy"}, {"basis": [], "class_module": "tilings.strategies.verification", "ignore_parent": false, "strategy_class": "OneByOneVerificationStrategy", "symmetry": false}, {"basis": [], "class_module": "tilings.strategies.verification", "ignore_parent": false, "strategy_class": "LocallyFactorableVerificationStrategy", "symmetry": false}]}
Specification JSON:
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