0123_0213_1230_2301_3201

Counting sequence:
1, 1, 2, 6, 19, 50, 107, 197, 327, 504, 735, 1027, 1387, 1822, 2339, 2945, 3647, 4452, 5367, 6399, 7555, 8842, 10267, 11837, 13559, 15440, 17487, 19707, 22107, 24694, 27475, 30457, 33647, 37052, 40679, 44535, 48627, 52962, 57547, 62389, 67495, 72872, 78527, 84467, 90699, 97230, 104067, 111217, 118687, 126484, 134615, 143087, 151907, 161082, 170619, 180525, 190807, 201472, 212527, 223979, 235835, 248102, 260787, 273897, 287439, 301420, 315847, 330727, 346067, 361874, 378155, 394917, 412167, 429912, 448159, 466915, 486187, 505982, 526307, 547169, 568575, 590532, 613047, 636127, 659779, 684010, 708827, 734237, 760247, 786864, 814095, 841947, 870427, 899542, 929299, 959705, 990767, 1022492, 1054887, 1087959, 1121715

Generating function in Maple syntax:
-(x^7+x^6-3*x^5-4*x^4-4*x^2+3*x-1)/(x-1)^4

Generating function in latex syntax:
-\frac{x^{7}+x^{6}-3 x^{5}-4 x^{4}-4 x^{2}+3 x -1}{\left(x -1\right)^{4}}

Generating function in sympy syntax:
(-x**7 - x**6 + 3*x**5 + 4*x**4 + 4*x**2 - 3*x + 1)/(x - 1)**4

Implicit equation for the generating function in Maple syntax:
(x-1)^4*F(x)+x^7+x^6-3*x^5-4*x^4-4*x^2+3*x-1 = 0

Implicit equation for the generating function in latex syntax:
\left(x -1\right)^{4} F \! \left(x \right)+x^{7}+x^{6}-3 x^{5}-4 x^{4}-4 x^{2}+3 x -1 = 0

Explicit closed form in Maple syntax:
piecewise(Or(n = 0,n = 1),1,n = 2,2,n = 3,6,15+7/6*n^3-9/2*n^2+1/3*n)

Explicit closed form in latex syntax:
\left\{\begin{array}{cc}1 & n =0\text{ or } n =1 \\ 2 & n =2 \\ 6 & n =3 \\ 15+\frac{7}{6} n^{3}-\frac{9}{2} n^{2}+\frac{1}{3} n & \mathit{\text{otherwise}} \end{array}\right.

Recurrence in maple format:
a(0) = 1
a(1) = 1
a(2) = 2
a(3) = 6
a(4) = 19
a(5) = 50
a(6) = 107
a(7) = 197
a(n) = 15+7/6*n^3-9/2*n^2+1/3*n, 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) = 19
a \! \left(5\right) = 50
a \! \left(6\right) = 107
a \! \left(7\right) = 197
a \! \left(n \right) = 15+\frac{7}{6} n^{3}-\frac{9}{2} n^{2}+\frac{1}{3} n, \quad n \geq 8

Specification 1
Strategy pack name: point_placements
Tree: http://permpal.com/tree/16930/
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[21,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[20,x]
F[14,x] = F[15,x]
F[15,x] = F[16,x]*F[4,x]
F[16,x] = F[10,x]+F[17,x]
F[17,x] = F[11,x]+F[18,x]
F[18,x] = F[19,x]
F[19,x] = F[17,x]*F[4,x]
F[20,x] = F[19,x]
F[21,x] = F[22,x]+F[38,x]
F[22,x] = F[23,x]
F[23,x] = F[24,x]*F[4,x]
F[24,x] = F[25,x]+F[26,x]
F[25,x] = F[1,x]+F[14,x]
F[26,x] = F[11,x]+F[27,x]
F[27,x] = F[28,x]+F[29,x]+F[31,x]
F[28,x] = 0
F[29,x] = F[30,x]*F[4,x]
F[30,x] = F[14,x]+F[27,x]
F[31,x] = F[32,x]*F[4,x]
F[32,x] = F[33,x]+F[37,x]
F[33,x] = F[11,x]+F[34,x]
F[34,x] = F[35,x]
F[35,x] = F[36,x]*F[4,x]
F[36,x] = F[11,x]+F[34,x]
F[37,x] = F[18,x]
F[38,x] = F[28,x]+F[39,x]+F[63,x]
F[39,x] = F[4,x]*F[40,x]
F[40,x] = F[41,x]+F[59,x]
F[41,x] = F[42,x]+F[7,x]
F[42,x] = F[28,x]+F[43,x]+F[50,x]
F[43,x] = F[4,x]*F[44,x]
F[44,x] = F[45,x]+F[46,x]
F[45,x] = F[11,x]+F[18,x]
F[46,x] = F[18,x]+F[47,x]
F[47,x] = F[48,x]
F[48,x] = F[4,x]*F[49,x]
F[49,x] = F[18,x]+F[47,x]
F[50,x] = F[4,x]*F[51,x]
F[51,x] = F[52,x]+F[53,x]
F[52,x] = F[11,x]
F[53,x] = F[54,x]
F[54,x] = F[28,x]+F[55,x]+F[56,x]
F[55,x] = F[4,x]*F[45,x]
F[56,x] = F[4,x]*F[57,x]
F[57,x] = F[52,x]+F[58,x]
F[58,x] = F[18,x]
F[59,x] = F[60,x]+F[69,x]
F[60,x] = F[28,x]+F[61,x]+F[63,x]
F[61,x] = F[4,x]*F[62,x]
F[62,x] = F[60,x]+F[7,x]
F[63,x] = F[4,x]*F[64,x]
F[64,x] = F[33,x]+F[65,x]
F[65,x] = F[27,x]+F[66,x]
F[66,x] = F[67,x]
F[67,x] = F[4,x]*F[68,x]
F[68,x] = F[20,x]+F[66,x]
F[69,x] = F[28,x]+F[70,x]+F[72,x]+F[78,x]
F[70,x] = F[4,x]*F[71,x]
F[71,x] = F[42,x]+F[69,x]
F[72,x] = F[4,x]*F[73,x]
F[73,x] = F[74,x]
F[74,x] = F[34,x]+F[75,x]
F[75,x] = F[76,x]
F[76,x] = F[4,x]*F[77,x]
F[77,x] = F[18,x]+F[75,x]
F[78,x] = F[4,x]*F[79,x]
F[79,x] = F[80,x]+F[81,x]
F[80,x] = F[18,x]
F[81,x] = F[82,x]
F[82,x] = 2*F[28,x]+F[83,x]+F[85,x]
F[83,x] = F[4,x]*F[84,x]
F[84,x] = F[34,x]
F[85,x] = F[4,x]*F[86,x]
F[86,x] = F[80,x]+F[87,x]
F[87,x] = F[47,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_{21}\! \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_{20}\! \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_{10}\! \left(x \right)+F_{17}\! \left(x \right)
F_{17}\! \left(x \right) = F_{11}\! \left(x \right)+F_{18}\! \left(x \right)
F_{18}\! \left(x \right) = F_{19}\! \left(x \right)
F_{19}\! \left(x \right) = F_{17}\! \left(x \right) F_{4}\! \left(x \right)
F_{20}\! \left(x \right) = F_{19}\! \left(x \right)
F_{21}\! \left(x \right) = F_{22}\! \left(x \right)+F_{38}\! \left(x \right)
F_{22}\! \left(x \right) = F_{23}\! \left(x \right)
F_{23}\! \left(x \right) = F_{24}\! \left(x \right) F_{4}\! \left(x \right)
F_{24}\! \left(x \right) = F_{25}\! \left(x \right)+F_{26}\! \left(x \right)
F_{25}\! \left(x \right) = F_{1}\! \left(x \right)+F_{14}\! \left(x \right)
F_{26}\! \left(x \right) = F_{11}\! \left(x \right)+F_{27}\! \left(x \right)
F_{27}\! \left(x \right) = F_{28}\! \left(x \right)+F_{29}\! \left(x \right)+F_{31}\! \left(x \right)
F_{28}\! \left(x \right) = 0
F_{29}\! \left(x \right) = F_{30}\! \left(x \right) F_{4}\! \left(x \right)
F_{30}\! \left(x \right) = F_{14}\! \left(x \right)+F_{27}\! \left(x \right)
F_{31}\! \left(x \right) = F_{32}\! \left(x \right) F_{4}\! \left(x \right)
F_{32}\! \left(x \right) = F_{33}\! \left(x \right)+F_{37}\! \left(x \right)
F_{33}\! \left(x \right) = F_{11}\! \left(x \right)+F_{34}\! \left(x \right)
F_{34}\! \left(x \right) = F_{35}\! \left(x \right)
F_{35}\! \left(x \right) = F_{36}\! \left(x \right) F_{4}\! \left(x \right)
F_{36}\! \left(x \right) = F_{11}\! \left(x \right)+F_{34}\! \left(x \right)
F_{37}\! \left(x \right) = F_{18}\! \left(x \right)
F_{38}\! \left(x \right) = F_{28}\! \left(x \right)+F_{39}\! \left(x \right)+F_{63}\! \left(x \right)
F_{39}\! \left(x \right) = F_{4}\! \left(x \right) F_{40}\! \left(x \right)
F_{40}\! \left(x \right) = F_{41}\! \left(x \right)+F_{59}\! \left(x \right)
F_{41}\! \left(x \right) = F_{42}\! \left(x \right)+F_{7}\! \left(x \right)
F_{42}\! \left(x \right) = F_{28}\! \left(x \right)+F_{43}\! \left(x \right)+F_{50}\! \left(x \right)
F_{43}\! \left(x \right) = F_{4}\! \left(x \right) F_{44}\! \left(x \right)
F_{44}\! \left(x \right) = F_{45}\! \left(x \right)+F_{46}\! \left(x \right)
F_{45}\! \left(x \right) = F_{11}\! \left(x \right)+F_{18}\! \left(x \right)
F_{46}\! \left(x \right) = F_{18}\! \left(x \right)+F_{47}\! \left(x \right)
F_{47}\! \left(x \right) = F_{48}\! \left(x \right)
F_{48}\! \left(x \right) = F_{4}\! \left(x \right) F_{49}\! \left(x \right)
F_{49}\! \left(x \right) = F_{18}\! \left(x \right)+F_{47}\! \left(x \right)
F_{50}\! \left(x \right) = F_{4}\! \left(x \right) F_{51}\! \left(x \right)
F_{51}\! \left(x \right) = F_{52}\! \left(x \right)+F_{53}\! \left(x \right)
F_{52}\! \left(x \right) = F_{11}\! \left(x \right)
F_{53}\! \left(x \right) = F_{54}\! \left(x \right)
F_{54}\! \left(x \right) = F_{28}\! \left(x \right)+F_{55}\! \left(x \right)+F_{56}\! \left(x \right)
F_{55}\! \left(x \right) = F_{4}\! \left(x \right) F_{45}\! \left(x \right)
F_{56}\! \left(x \right) = F_{4}\! \left(x \right) F_{57}\! \left(x \right)
F_{57}\! \left(x \right) = F_{52}\! \left(x \right)+F_{58}\! \left(x \right)
F_{58}\! \left(x \right) = F_{18}\! \left(x \right)
F_{59}\! \left(x \right) = F_{60}\! \left(x \right)+F_{69}\! \left(x \right)
F_{60}\! \left(x \right) = F_{28}\! \left(x \right)+F_{61}\! \left(x \right)+F_{63}\! \left(x \right)
F_{61}\! \left(x \right) = F_{4}\! \left(x \right) F_{62}\! \left(x \right)
F_{62}\! \left(x \right) = F_{60}\! \left(x \right)+F_{7}\! \left(x \right)
F_{63}\! \left(x \right) = F_{4}\! \left(x \right) F_{64}\! \left(x \right)
F_{64}\! \left(x \right) = F_{33}\! \left(x \right)+F_{65}\! \left(x \right)
F_{65}\! \left(x \right) = F_{27}\! \left(x \right)+F_{66}\! \left(x \right)
F_{66}\! \left(x \right) = F_{67}\! \left(x \right)
F_{67}\! \left(x \right) = F_{4}\! \left(x \right) F_{68}\! \left(x \right)
F_{68}\! \left(x \right) = F_{20}\! \left(x \right)+F_{66}\! \left(x \right)
F_{69}\! \left(x \right) = F_{28}\! \left(x \right)+F_{70}\! \left(x \right)+F_{72}\! \left(x \right)+F_{78}\! \left(x \right)
F_{70}\! \left(x \right) = F_{4}\! \left(x \right) F_{71}\! \left(x \right)
F_{71}\! \left(x \right) = F_{42}\! \left(x \right)+F_{69}\! \left(x \right)
F_{72}\! \left(x \right) = F_{4}\! \left(x \right) F_{73}\! \left(x \right)
F_{73}\! \left(x \right) = F_{74}\! \left(x \right)
F_{74}\! \left(x \right) = F_{34}\! \left(x \right)+F_{75}\! \left(x \right)
F_{75}\! \left(x \right) = F_{76}\! \left(x \right)
F_{76}\! \left(x \right) = F_{4}\! \left(x \right) F_{77}\! \left(x \right)
F_{77}\! \left(x \right) = F_{18}\! \left(x \right)+F_{75}\! \left(x \right)
F_{78}\! \left(x \right) = F_{4}\! \left(x \right) F_{79}\! \left(x \right)
F_{79}\! \left(x \right) = F_{80}\! \left(x \right)+F_{81}\! \left(x \right)
F_{80}\! \left(x \right) = F_{18}\! \left(x \right)
F_{81}\! \left(x \right) = F_{82}\! \left(x \right)
F_{82}\! \left(x \right) = 2 F_{28}\! \left(x \right)+F_{83}\! \left(x \right)+F_{85}\! \left(x \right)
F_{83}\! \left(x \right) = F_{4}\! \left(x \right) F_{84}\! \left(x \right)
F_{84}\! \left(x \right) = F_{34}\! \left(x \right)
F_{85}\! \left(x \right) = F_{4}\! \left(x \right) F_{86}\! \left(x \right)
F_{86}\! \left(x \right) = F_{80}\! \left(x \right)+F_{87}\! \left(x \right)
F_{87}\! \left(x \right) = F_{47}\! \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_21(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_20(x))
Eq(F_14(x), F_15(x))
Eq(F_15(x), F_16(x)*F_4(x))
Eq(F_16(x), F_10(x) + F_17(x))
Eq(F_17(x), F_11(x) + F_18(x))
Eq(F_18(x), F_19(x))
Eq(F_19(x), F_17(x)*F_4(x))
Eq(F_20(x), F_19(x))
Eq(F_21(x), F_22(x) + F_38(x))
Eq(F_22(x), F_23(x))
Eq(F_23(x), F_24(x)*F_4(x))
Eq(F_24(x), F_25(x) + F_26(x))
Eq(F_25(x), F_1(x) + F_14(x))
Eq(F_26(x), F_11(x) + F_27(x))
Eq(F_27(x), F_28(x) + F_29(x) + F_31(x))
Eq(F_28(x), 0)
Eq(F_29(x), F_30(x)*F_4(x))
Eq(F_30(x), F_14(x) + F_27(x))
Eq(F_31(x), F_32(x)*F_4(x))
Eq(F_32(x), F_33(x) + F_37(x))
Eq(F_33(x), F_11(x) + F_34(x))
Eq(F_34(x), F_35(x))
Eq(F_35(x), F_36(x)*F_4(x))
Eq(F_36(x), F_11(x) + F_34(x))
Eq(F_37(x), F_18(x))
Eq(F_38(x), F_28(x) + F_39(x) + F_63(x))
Eq(F_39(x), F_4(x)*F_40(x))
Eq(F_40(x), F_41(x) + F_59(x))
Eq(F_41(x), F_42(x) + F_7(x))
Eq(F_42(x), F_28(x) + F_43(x) + F_50(x))
Eq(F_43(x), F_4(x)*F_44(x))
Eq(F_44(x), F_45(x) + F_46(x))
Eq(F_45(x), F_11(x) + F_18(x))
Eq(F_46(x), F_18(x) + F_47(x))
Eq(F_47(x), F_48(x))
Eq(F_48(x), F_4(x)*F_49(x))
Eq(F_49(x), F_18(x) + F_47(x))
Eq(F_50(x), F_4(x)*F_51(x))
Eq(F_51(x), F_52(x) + F_53(x))
Eq(F_52(x), F_11(x))
Eq(F_53(x), F_54(x))
Eq(F_54(x), F_28(x) + F_55(x) + F_56(x))
Eq(F_55(x), F_4(x)*F_45(x))
Eq(F_56(x), F_4(x)*F_57(x))
Eq(F_57(x), F_52(x) + F_58(x))
Eq(F_58(x), F_18(x))
Eq(F_59(x), F_60(x) + F_69(x))
Eq(F_60(x), F_28(x) + F_61(x) + F_63(x))
Eq(F_61(x), F_4(x)*F_62(x))
Eq(F_62(x), F_60(x) + F_7(x))
Eq(F_63(x), F_4(x)*F_64(x))
Eq(F_64(x), F_33(x) + F_65(x))
Eq(F_65(x), F_27(x) + F_66(x))
Eq(F_66(x), F_67(x))
Eq(F_67(x), F_4(x)*F_68(x))
Eq(F_68(x), F_20(x) + F_66(x))
Eq(F_69(x), F_28(x) + F_70(x) + F_72(x) + F_78(x))
Eq(F_70(x), F_4(x)*F_71(x))
Eq(F_71(x), F_42(x) + F_69(x))
Eq(F_72(x), F_4(x)*F_73(x))
Eq(F_73(x), F_74(x))
Eq(F_74(x), F_34(x) + F_75(x))
Eq(F_75(x), F_76(x))
Eq(F_76(x), F_4(x)*F_77(x))
Eq(F_77(x), F_18(x) + F_75(x))
Eq(F_78(x), F_4(x)*F_79(x))
Eq(F_79(x), F_80(x) + F_81(x))
Eq(F_80(x), F_18(x))
Eq(F_81(x), F_82(x))
Eq(F_82(x), 2*F_28(x) + F_83(x) + F_85(x))
Eq(F_83(x), F_4(x)*F_84(x))
Eq(F_84(x), F_34(x))
Eq(F_85(x), F_4(x)*F_86(x))
Eq(F_86(x), F_80(x) + F_87(x))
Eq(F_87(x), F_47(x))
Pack JSON:
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Specification JSON:
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