0132_0231_1023_1203
Counting sequence:
1, 1, 2, 6, 20, 67, 225, 764, 2631, 9181, 32402, 115453, 414754, 1500578, 5463000, 19998453, 73568615, 271830530, 1008380162, 3754120497, 14021977177, 52529690405, 197327462648, 743126365765, 2805087665540, 10611194382674, 40220692493943, 152736381062327, 581017638928953, 2213815305898790, 8448014020056856, 32284120450660846, 123540067793142664, 473345042578691611, 1815801253643194490, 6973504929227843456, 26810215037281789599, 103179144697649710363, 397469530773190473339, 1532553079382495423390, 5914362102376772360311, 22843532625297379179662, 88300887626738995549262, 341584298417083434838611, 1322352806766310022547649, 5122711539109635358612847, 19858339400019166205476226, 77030824967343027035144167, 298987890629584348745996912, 1161180073855511916643194876, 4512244005883154816638431575, 17543783843211207828151667715, 68246884341788653029741616011, 265621316425815382207552152256, 1034321765763888806566070779381, 4029522384130756247097466917334, 15705420324752369780363805106302, 61240243857367220143229194139765, 238896190993620143521604602286995, 932310189396266393154890517092893, 3639860562835110578164747870997648, 14215975572423421826482018378201285, 55543206648340894203746785663784349, 217091382346030564134856290089676412, 848802787261612727068931282808616527, 3319854311290821886619571994823701965, 12988975830755371257702389035024740878, 50835871765248800459580642757124914301, 199022021874589148268512895459180741386, 779405849448000024080062123767692400258, 3053192540133949534081531947878132691757, 11963801984179885011500800007747839239821, 46892713206514854641604697849430125503263, 183848204775571657765383860391536916683596, 720988278504288038505499802853952024330325, 2828191467908831210595448599121943337959682, 11096814671006515055799909643741128621419426, 43550587460078214282315276817346250842426841, 170959486103416912525622265896946636571570209, 671263961050015455063058604959122208663204833, 2636282426329521014462362284467015397850403072, 10355871117753002337105526765752169701292717593, 40688824789919389099237449046754748857686185390, 159902499495093884153235865003599248903305031298, 628528277715688132513049634296251593509353653205, 2471051483490328634835038876860558906801234306315, 9716820497694777528720967782448192208752650709857, 38216424938244395923665436553851832671788427456992, 150334122822380527521999455013976675120397170435597, 591486606125650044176111226322012380893515614770240, 2327610778663725857663494606539575395009888070202988, 9161196966456400333532494714309682120234210766515991, 36063582718434453011841136157704903028363921497946351, 141990317041842383422894873819512970226821764754880763, 559139626406053174905104046694459631306586983684849022, 2202175964450067146727719583266378886057265539219324821, 8674661422210759275285229647496316565636928912610481658, 34175936566226947495383772999649259554544824043281272986, 134664878796480023463140997620888496287027576701031004055, 530704759496135371092831256294005823984756689866249162697, 2091775480868392732981927722145852803939523494224581680531
Generating function in Maple syntax:
-1/2*(-3*x^2+(x^2-x+1)*(1-4*x)^(1/2)+3*x-1)/x^2/(x^3-x+1)*(x-1)^2
Generating function in latex syntax:
-\frac{\left(-3 x^{2}+\left(x^{2}-x +1\right) \sqrt{1-4 x}+3 x -1\right) \left(x -1\right)^{2}}{2 x^{2} \left(x^{3}-x +1\right)}
Generating function in sympy syntax:
(x - 1)**2*(3*x**2/2 - 3*x/2 - sqrt(1 - 4*x)*(x**2 - x + 1)/2 + 1/2)/(x**2*(x**3 - x + 1))
Implicit equation for the generating function in Maple syntax:
x^2*(x^3-x+1)*F(x)^2-(3*x^2-3*x+1)*(x-1)^2*F(x)+(x-1)^4 = 0
Implicit equation for the generating function in latex syntax:
x^{2} \left(x^{3}-x +1\right) F \! \left(x \right)^{2}-\left(3 x^{2}-3 x +1\right) \left(x -1\right)^{2} F \! \left(x \right)+\left(x -1\right)^{4} = 0
Recurrence in maple format:
a(0) = 1
a(1) = 1
a(2) = 2
a(3) = 6
a(4) = 20
a(5) = 67
a(6) = 225
a(n+7) = -2*(1+2*n)/(9+n)*a(n)-(47+6*n)/(9+n)*a(2+n)+(9*n+26)/(9+n)*a(n+1)-(-15+7*n)/(9+n)*a(n+3)+6*(3*n+11)/(9+n)*a(n+4)-4*(4*n+23)/(9+n)*a(n+5)+(7*n+52)/(9+n)*a(n+6), n >= 7
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) = 67
a \! \left(6\right) = 225
a \! \left(n +7\right) = -\frac{2 \left(1+2 n \right) a \! \left(n \right)}{9+n}-\frac{\left(47+6 n \right) a \! \left(2+n \right)}{9+n}+\frac{\left(9 n +26\right) a \! \left(n +1\right)}{9+n}-\frac{\left(-15+7 n \right) a \! \left(n +3\right)}{9+n}+\frac{6 \left(3 n +11\right) a \! \left(n +4\right)}{9+n}-\frac{4 \left(4 n +23\right) a \! \left(n +5\right)}{9+n}+\frac{\left(7 n +52\right) a \! \left(n +6\right)}{9+n}, \quad n \geq 7
Specification 1
Strategy pack name: row_placements_tracked_fusion
Tree: http://permpal.com/tree/21218/
System of equations in Maple syntax:
F[0,x] = F[1,x]+F[2,x]
F[1,x] = 1
F[2,x] = F[10,x]*F[3,x]
F[3,x] = F[1,x]+F[21,x]+F[4,x]
F[4,x] = F[10,x]*F[5,x]
F[5,x] = F[1,x]+F[11,x]+F[21,x]+F[6,x]
F[6,x] = F[7,x]
F[7,x] = F[0,x]*F[10,x]*F[8,x]
F[8,x] = F[1,x]+F[9,x]
F[9,x] = F[10,x]*F[8,x]
F[10,x] = x
F[11,x] = F[12,x,1]
F[12,x,k[0]] = F[10,x]*F[13,x,k[0]]
F[13,x,k[0]] = F[1,x]+F[14,x,k[0]]+F[16,x,k[0]]+F[19,x,k[0]]+F[21,x]
F[14,x,k[0]] = F[0,x]*F[15,x,k[0]]
F[15,x,k[0]] = k[0]*x
F[16,x,k[0]] = F[17,x,k[0]]
F[17,x,k[0]] = F[0,x]*F[10,x]*F[18,x,k[0]]*F[8,x]
F[18,x,k[0]] = F[1,x]+F[15,x,k[0]]
F[19,x,k[0]] = F[10,x]*F[20,x,k[0]]
F[20,x,k[0]] = (F[13,x,k[0]]*k[0]-F[13,x,1])/(-1+k[0])
F[21,x] = F[10,x]*F[22,x]
F[22,x] = F[23,x,1]
F[23,x,k[0]] = F[1,x]+F[12,x,k[0]]+F[24,x,k[0]]+F[25,x,k[0]]
F[24,x,k[0]] = F[15,x,k[0]]*F[23,x,k[0]]
F[25,x,k[0]] = F[10,x]*F[26,x,k[0]]
F[26,x,k[0]] = (F[23,x,k[0]]*k[0]-F[23,x,1])/(-1+k[0])
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_{10}\! \left(x \right) F_{3}\! \left(x \right)
F_{3}\! \left(x \right) = F_{1}\! \left(x \right)+F_{21}\! \left(x \right)+F_{4}\! \left(x \right)
F_{4}\! \left(x \right) = F_{10}\! \left(x \right) F_{5}\! \left(x \right)
F_{5}\! \left(x \right) = F_{1}\! \left(x \right)+F_{11}\! \left(x \right)+F_{21}\! \left(x \right)+F_{6}\! \left(x \right)
F_{6}\! \left(x \right) = F_{7}\! \left(x \right)
F_{7}\! \left(x \right) = F_{0}\! \left(x \right) F_{10}\! \left(x \right) F_{8}\! \left(x \right)
F_{8}\! \left(x \right) = F_{1}\! \left(x \right)+F_{9}\! \left(x \right)
F_{9}\! \left(x \right) = F_{10}\! \left(x \right) F_{8}\! \left(x \right)
F_{10}\! \left(x \right) = x
F_{11}\! \left(x \right) = F_{12}\! \left(x , 1\right)
F_{12}\! \left(x , y\right) = F_{10}\! \left(x \right) F_{13}\! \left(x , y\right)
F_{13}\! \left(x , y\right) = F_{1}\! \left(x \right)+F_{14}\! \left(x , y\right)+F_{16}\! \left(x , y\right)+F_{19}\! \left(x , y\right)+F_{21}\! \left(x \right)
F_{14}\! \left(x , y\right) = F_{0}\! \left(x \right) F_{15}\! \left(x , y\right)
F_{15}\! \left(x , y\right) = y x
F_{16}\! \left(x , y\right) = F_{17}\! \left(x , y\right)
F_{17}\! \left(x , y\right) = F_{0}\! \left(x \right) F_{10}\! \left(x \right) F_{18}\! \left(x , y\right) F_{8}\! \left(x \right)
F_{18}\! \left(x , y\right) = F_{1}\! \left(x \right)+F_{15}\! \left(x , y\right)
F_{19}\! \left(x , y\right) = F_{10}\! \left(x \right) F_{20}\! \left(x , y\right)
F_{20}\! \left(x , y\right) = \frac{y F_{13}\! \left(x , y\right)-F_{13}\! \left(x , 1\right)}{-1+y}
F_{21}\! \left(x \right) = F_{10}\! \left(x \right) F_{22}\! \left(x \right)
F_{22}\! \left(x \right) = F_{23}\! \left(x , 1\right)
F_{23}\! \left(x , y\right) = F_{1}\! \left(x \right)+F_{12}\! \left(x , y\right)+F_{24}\! \left(x , y\right)+F_{25}\! \left(x , y\right)
F_{24}\! \left(x , y\right) = F_{15}\! \left(x , y\right) F_{23}\! \left(x , y\right)
F_{25}\! \left(x , y\right) = F_{10}\! \left(x \right) F_{26}\! \left(x , y\right)
F_{26}\! \left(x , y\right) = \frac{y F_{23}\! \left(x , y\right)-F_{23}\! \left(x , 1\right)}{-1+y}
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_10(x)*F_3(x))
Eq(F_3(x), F_1(x) + F_21(x) + F_4(x))
Eq(F_4(x), F_10(x)*F_5(x))
Eq(F_5(x), F_1(x) + F_11(x) + F_21(x) + F_6(x))
Eq(F_6(x), F_7(x))
Eq(F_7(x), F_0(x)*F_10(x)*F_8(x))
Eq(F_8(x), F_1(x) + F_9(x))
Eq(F_9(x), F_10(x)*F_8(x))
Eq(F_10(x), x)
Eq(F_11(x), F_12(x, 1))
Eq(F_12(x, k_0), F_10(x)*F_13(x, k_0))
Eq(F_13(x, k_0), F_1(x) + F_14(x, k_0) + F_16(x, k_0) + F_19(x, k_0) + F_21(x))
Eq(F_14(x, k_0), F_0(x)*F_15(x, k_0))
Eq(F_15(x, k_0), k_0*x)
Eq(F_16(x, k_0), F_17(x, k_0))
Eq(F_17(x, k_0), F_0(x)*F_10(x)*F_18(x, k_0)*F_8(x))
Eq(F_18(x, k_0), F_1(x) + F_15(x, k_0))
Eq(F_19(x, k_0), F_10(x)*F_20(x, k_0))
Eq(F_20(x, k_0), (-k_0*F_13(x, k_0) + F_13(x, 1))/(1 - k_0))
Eq(F_21(x), F_10(x)*F_22(x))
Eq(F_22(x), F_23(x, 1))
Eq(F_23(x, k_0), F_1(x) + F_12(x, k_0) + F_24(x, k_0) + F_25(x, k_0))
Eq(F_24(x, k_0), F_15(x, k_0)*F_23(x, k_0))
Eq(F_25(x, k_0), F_10(x)*F_26(x, k_0))
Eq(F_26(x, k_0), (-k_0*F_23(x, k_0) + F_23(x, 1))/(1 - k_0))
Pack JSON:
{"expansion_strats": [[{"class_module": "tilings.strategies.requirement_placement", "dirs": [0, 1, 2, 3], "ignore_parent": false, "partial": false, "place_col": false, "place_row": true, "strategy_class": "RowAndColumnPlacementFactory"}]], "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.rearrange_assumption", "strategy_class": "RearrangeAssumptionFactory"}, {"class_module": "tilings.strategies.assumption_insertion", "strategy_class": "AddAssumptionFactory"}, {"class_module": "tilings.strategies.factor", "ignore_parent": true, "interleaving": null, "strategy_class": "FactorFactory", "tracked": false, "unions": false, "workable": true}, {"class_module": "tilings.strategies.fusion.fusion", "strategy_class": "FusionFactory", "tracked": true}], "iterative": false, "name": "row_placements_tracked_fusion", "symmetries": [], "ver_strats": [{"class_module": "tilings.strategies.verification", "strategy_class": "BasicVerificationStrategy"}, {"class_module": "tilings.strategies.verification", "ignore_parent": true, "strategy_class": "InsertionEncodingVerificationStrategy"}, {"basis": [], "class_module": "tilings.strategies.verification", "ignore_parent": true, "strategy_class": "OneByOneVerificationStrategy", "symmetry": false}, {"basis": [], "class_module": "tilings.strategies.verification", "ignore_parent": true, "strategy_class": "LocallyFactorableVerificationStrategy", "symmetry": false}]}
Specification JSON:
{"root": {"assumptions": [], "class_module": "tilings.tiling", "comb_class": "Tiling", "obstructions": [{"patt": [0, 1, 3, 2], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [0, 2, 3, 1], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [1, 0, 2, 3], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [1, 2, 0, 3], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}], "requirements": []}, "rules": [{"children": [{"assumptions": [], "class_module": "tilings.tiling", "comb_class": "Tiling", "obstructions": [{"patt": [0], "pos": [[0, 0]]}], "requirements": []}, {"assumptions": [], "class_module": "tilings.tiling", "comb_class": "Tiling", "obstructions": [{"patt": [0], "pos": [[0, 1]]}, {"patt": [0], "pos": [[1, 0]]}, {"patt": [0], "pos": [[2, 1]]}, {"patt": [0, 1], "pos": [[1, 1], [1, 1]]}, {"patt": [1, 0], "pos": [[1, 1], [1, 1]]}, {"patt": [0, 1, 2], "pos": [[0, 0], [0, 0], [2, 0]]}, {"patt": [0, 2, 1], "pos": [[0, 0], [0, 0], [2, 0]]}, {"patt": [1, 0, 2], "pos": [[0, 0], [0, 0], [0, 0]]}, {"patt": [1, 2, 0], "pos": [[0, 0], [0, 0], [0, 0]]}, {"patt": [0, 1, 3, 2], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [0, 1, 3, 2], "pos": [[0, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [0, 1, 3, 2], "pos": [[2, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [0, 2, 3, 1], "pos": [[0, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [0, 2, 3, 1], "pos": [[2, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [1, 0, 2, 3], "pos": [[0, 0], [0, 0], [2, 0], [2, 0]]}, {"patt": [1, 0, 2, 3], "pos": [[0, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [1, 0, 2, 3], "pos": [[2, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [1, 2, 0, 3], "pos": [[0, 0], [2, 0], [2, 0], [2, 0]]}, {"patt": [1, 2, 0, 3], "pos": [[2, 0], [2, 0], [2, 0], [2, 0]]}], "requirements": [[{"patt": [0], "pos": [[1, 1]]}]]}], "class_module": "comb_spec_searcher.strategies.rule", "comb_class": {"assumptions": [], "class_module": "tilings.tiling", "comb_class": "Tiling", "obstructions": [{"patt": [0, 1, 3, 2], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [0, 2, 3, 1], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [1, 0, 2, 3], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [1, 2, 0, 3], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}], "requirements": []}, "rule_class": "Rule", "strategy": {"class_module": "tilings.strategies.requirement_placement", "direction": 1, "gps": [{"patt": [0], "pos": [[0, 0]]}], "ignore_parent": false, "include_empty": true, "indices": [0], "own_col": true, "own_row": true, "strategy_class": "RequirementPlacementStrategy"}}, {"class_module": "comb_spec_searcher.strategies.rule", "comb_class": {"assumptions": [], "class_module": "tilings.tiling", "comb_class": "Tiling", "obstructions": [{"patt": [0], "pos": [[0, 0]]}], "requirements": []}, "rule_class": "VerificationRule", "strategy": {"class_module": "tilings.strategies.verification", "strategy_class": "BasicVerificationStrategy"}}, {"children": [{"assumptions": [], "class_module": "tilings.tiling", "comb_class": "Tiling", "obstructions": [{"patt": [0, 1, 2], 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