0132_0213_0231_1203_2013
Counting sequence:
1, 1, 2, 6, 19, 61, 200, 670, 2286, 7918, 27770, 98424, 351983, 1268541, 4602752, 16799894, 61642078, 227239086, 841230292, 3126039364, 11656497518, 43601626146, 163561902392, 615183356156, 2319423532024, 8764535189296, 33187922345210, 125912855167740, 478566026445639, 1821981741582237, 6947523496926720, 26531247045046246, 101458518064180342, 388496850410401046, 1489438317757096124, 5716946338028471716, 21967730148530568090, 84500786210708811750, 325362675607928077200, 1253963117775831825540, 4837177554652570799540, 18675451655897927799380, 72161387525162096250340, 279046981891168803064320, 1079875155370713445021990, 4181957093153091701886130, 16206242038296671727566720, 62844825734209285172404860, 243853878183784835596929836, 946786171604951950795310348, 3678121238892137398800366280, 14296918790718816205858511784, 55602210426277651656664042828, 216354674317003762152262618708, 842281018394297636096365780568, 3280624836853823068298823765384, 12783732292121663453598422099276, 49837173589868477984075559166292, 194373574863034987105848910394170, 758407972802372276591875798646916, 2960359682365222586939105377538551, 11559960588194422036255356327743581, 45157837154874987223897766839027712, 176469516519300116051306917558739334, 689860299579414127136098459904384678, 2697757047024460602171157906927654886, 10553348615932855902785427131079364972, 41297069580922509733113392202437616804, 161653684528583926697019755032576692418, 632973452693155819297042250798943343966, 2479220518541775500413031381685073083632, 9713394024726844742519539443415389066324, 38067083253139945981452643284620166453908, 149227080713789495258356900506142404492116, 585142927146857267613242794108408819647052, 2295036024756425069733877087048788782517744, 9003831459406286767868743225340924738806978, 35332363889389361175241199969596422370590886, 138682866941552438288603675444347679013715712, 544471433382893443939657590947137812530031124, 2138095235932609330061159963475696836439193668, 8398007002055390784227280778206889156622467876, 32992887442670795055773156554845536491697356952, 129645388894950561324036721792992051552229160184, 509547071115054522768347240892723229457596543748, 2003087561984704691377158465059942703534305918556, 7875931406981628461270209410909570431274927186992, 30973360501538019902295376441071246739164746660744, 121830843657166146748388673381964194335460201450048, 479299384654574129499963890040278679603834687081776, 1885972779217816007869996714462700405141889881393252, 7422345881344471303975251464950057926459922261758264, 29216118848159826472207371416244360553866876210862838, 115021180398855885528946352205092868647792464370379506, 452903347204451573634687713412702125286333991638285312, 1783627460219286719725846872772309222398575729024990684, 7025418862478871458635006668704851210757132859966378428, 27676319489105119271357494613011608385711733332382311036, 109046346420179679481855911172482181591343642390791339992, 429713744823578193358852428705182266630885695193202615464, 1693602258510740554628468693816147988218798464495962694468
Generating function in Maple syntax:
1/2*(-2*x^2+2*x-1+(-4*x+1)^(1/2))/x^2/(x^2-2*x+2)*(x-1)
Generating function in latex syntax:
\frac{\left(-2 x^{2}+2 x -1+\sqrt{-4 x +1}\right) \left(x -1\right)}{2 x^{2} \left(x^{2}-2 x +2\right)}
Generating function in sympy syntax:
(x - 1)*(-x**2 + x + sqrt(1 - 4*x)/2 - 1/2)/(x**2*(x**2 - 2*x + 2))
Implicit equation for the generating function in Maple syntax:
x^2*(x^2-2*x+2)*F(x)^2+(x-1)*(2*x^2-2*x+1)*F(x)+(x-1)^2 = 0
Implicit equation for the generating function in latex syntax:
x^{2} \left(x^{2}-2 x +2\right) F \! \left(x \right)^{2}+\left(x -1\right) \left(2 x^{2}-2 x +1\right) F \! \left(x \right)+\left(x -1\right)^{2} = 0
Recurrence in maple format:
a(0) = 1
a(1) = 1
a(2) = 2
a(3) = 6
a(n+4) = -(5+2*n)/(6+n)*a(n)-1/2*(70+19*n)/(6+n)*a(2+n)+1/2*(13*n+42)/(6+n)*a(n+1)+2*(3*n+14)/(6+n)*a(n+3), n >= 4
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(n +4\right) = -\frac{\left(5+2 n \right) a \! \left(n \right)}{6+n}-\frac{\left(70+19 n \right) a \! \left(2+n \right)}{2 \left(6+n \right)}+\frac{\left(13 n +42\right) a \! \left(n +1\right)}{12+2 n}+\frac{2 \left(3 n +14\right) a \! \left(n +3\right)}{6+n}, \quad n \geq 4
Specification 1
Strategy pack name: row_placements_tracked_fusion
Tree: http://permpal.com/tree/21568/
System of equations in Maple syntax:
F[0,x] = F[1,x]+F[2,x]
F[1,x] = 1
F[2,x] = F[24,x]*F[3,x]
F[3,x] = F[1,x]+F[38,x]+F[4,x]
F[4,x] = F[5,x]
F[5,x] = F[24,x]*F[6,x]
F[6,x] = F[31,x]+F[7,x]
F[7,x] = F[8,x,1]
F[8,x,k[0]] = F[1,x]+F[11,x,k[0]]+F[9,x,k[0]]
F[9,x,k[0]] = F[10,x,k[0]]*F[8,x,k[0]]
F[10,x,k[0]] = k[0]*x
F[11,x,k[0]] = F[12,x,k[0]]*F[24,x]
F[12,x,k[0]] = F[1,x]+F[13,x,k[0]]+F[15,x,k[0]]+F[29,x,k[0]]
F[13,x,k[0]] = F[10,x,k[0]]*F[14,x,k[0]]
F[14,x,k[0]] = (F[8,x,k[0]]*k[0]-F[8,x,1])/(-1+k[0])
F[15,x,k[0]] = F[16,x,k[0]]
F[16,x,k[0]] = F[17,x,k[0]]*F[24,x]
F[17,x,k[0]] = F[18,x,k[0]]+F[25,x,k[0]]+F[7,x]
F[18,x,k[0]] = F[19,x,k[0]]
F[19,x,k[0]] = F[0,x]*F[10,x,k[0]]*F[20,x,k[0]]*F[22,x]
F[20,x,k[0]] = F[1,x]+F[21,x,k[0]]
F[21,x,k[0]] = F[10,x,k[0]]*F[20,x,k[0]]
F[22,x] = F[1,x]+F[23,x]
F[23,x] = F[22,x]*F[24,x]
F[24,x] = F[10,x,1]
F[25,x,k[0]] = F[26,x,k[0]]
F[26,x,k[0]] = F[0,x]*F[20,x,k[0]]*F[22,x]*F[24,x]*F[27,x]
F[27,x] = F[1,x]+F[28,x]
F[28,x] = F[24,x]*F[27,x]
F[29,x,k[0]] = F[24,x]*F[30,x,k[0]]
F[30,x,k[0]] = (F[12,x,k[0]]*k[0]-F[12,x,1])/(-1+k[0])
F[31,x] = F[32,x]
F[32,x] = F[0,x]*F[24,x]*F[33,x]
F[33,x] = F[34,x]+F[37,x]
F[34,x] = F[1,x]+F[35,x]
F[35,x] = F[36,x]
F[36,x] = F[24,x]*F[33,x]
F[37,x] = F[28,x]
F[38,x] = F[11,x,1]
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_{24}\! \left(x \right) F_{3}\! \left(x \right)
F_{3}\! \left(x \right) = F_{1}\! \left(x \right)+F_{38}\! \left(x \right)+F_{4}\! \left(x \right)
F_{4}\! \left(x \right) = F_{5}\! \left(x \right)
F_{5}\! \left(x \right) = F_{24}\! \left(x \right) F_{6}\! \left(x \right)
F_{6}\! \left(x \right) = F_{31}\! \left(x \right)+F_{7}\! \left(x \right)
F_{7}\! \left(x \right) = F_{8}\! \left(x , 1\right)
F_{8}\! \left(x , y\right) = F_{1}\! \left(x \right)+F_{11}\! \left(x , y\right)+F_{9}\! \left(x , y\right)
F_{9}\! \left(x , y\right) = F_{10}\! \left(x , y\right) F_{8}\! \left(x , y\right)
F_{10}\! \left(x , y\right) = y x
F_{11}\! \left(x , y\right) = F_{12}\! \left(x , y\right) F_{24}\! \left(x \right)
F_{12}\! \left(x , y\right) = F_{1}\! \left(x \right)+F_{13}\! \left(x , y\right)+F_{15}\! \left(x , y\right)+F_{29}\! \left(x , y\right)
F_{13}\! \left(x , y\right) = F_{10}\! \left(x , y\right) F_{14}\! \left(x , y\right)
F_{14}\! \left(x , y\right) = \frac{y F_{8}\! \left(x , y\right)-F_{8}\! \left(x , 1\right)}{-1+y}
F_{15}\! \left(x , y\right) = F_{16}\! \left(x , y\right)
F_{16}\! \left(x , y\right) = F_{17}\! \left(x , y\right) F_{24}\! \left(x \right)
F_{17}\! \left(x , y\right) = F_{18}\! \left(x , y\right)+F_{25}\! \left(x , y\right)+F_{7}\! \left(x \right)
F_{18}\! \left(x , y\right) = F_{19}\! \left(x , y\right)
F_{19}\! \left(x , y\right) = F_{0}\! \left(x \right) F_{10}\! \left(x , y\right) F_{20}\! \left(x , y\right) F_{22}\! \left(x \right)
F_{20}\! \left(x , y\right) = F_{1}\! \left(x \right)+F_{21}\! \left(x , y\right)
F_{21}\! \left(x , y\right) = F_{10}\! \left(x , y\right) F_{20}\! \left(x , y\right)
F_{22}\! \left(x \right) = F_{1}\! \left(x \right)+F_{23}\! \left(x \right)
F_{23}\! \left(x \right) = F_{22}\! \left(x \right) F_{24}\! \left(x \right)
F_{24}\! \left(x \right) = F_{10}\! \left(x , 1\right)
F_{25}\! \left(x , y\right) = F_{26}\! \left(x , y\right)
F_{26}\! \left(x , y\right) = F_{0}\! \left(x \right) F_{20}\! \left(x , y\right) F_{22}\! \left(x \right) F_{24}\! \left(x \right) F_{27}\! \left(x \right)
F_{27}\! \left(x \right) = F_{1}\! \left(x \right)+F_{28}\! \left(x \right)
F_{28}\! \left(x \right) = F_{24}\! \left(x \right) F_{27}\! \left(x \right)
F_{29}\! \left(x , y\right) = F_{24}\! \left(x \right) F_{30}\! \left(x , y\right)
F_{30}\! \left(x , y\right) = \frac{y F_{12}\! \left(x , y\right)-F_{12}\! \left(x , 1\right)}{-1+y}
F_{31}\! \left(x \right) = F_{32}\! \left(x \right)
F_{32}\! \left(x \right) = F_{0}\! \left(x \right) F_{24}\! \left(x \right) F_{33}\! \left(x \right)
F_{33}\! \left(x \right) = F_{34}\! \left(x \right)+F_{37}\! \left(x \right)
F_{34}\! \left(x \right) = F_{1}\! \left(x \right)+F_{35}\! \left(x \right)
F_{35}\! \left(x \right) = F_{36}\! \left(x \right)
F_{36}\! \left(x \right) = F_{24}\! \left(x \right) F_{33}\! \left(x \right)
F_{37}\! \left(x \right) = F_{28}\! \left(x \right)
F_{38}\! \left(x \right) = F_{11}\! \left(x , 1\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_24(x)*F_3(x))
Eq(F_3(x), F_1(x) + F_38(x) + F_4(x))
Eq(F_4(x), F_5(x))
Eq(F_5(x), F_24(x)*F_6(x))
Eq(F_6(x), F_31(x) + F_7(x))
Eq(F_7(x), F_8(x, 1))
Eq(F_8(x, k_0), F_1(x) + F_11(x, k_0) + F_9(x, k_0))
Eq(F_9(x, k_0), F_10(x, k_0)*F_8(x, k_0))
Eq(F_10(x, k_0), k_0*x)
Eq(F_11(x, k_0), F_12(x, k_0)*F_24(x))
Eq(F_12(x, k_0), F_1(x) + F_13(x, k_0) + F_15(x, k_0) + F_29(x, k_0))
Eq(F_13(x, k_0), F_10(x, k_0)*F_14(x, k_0))
Eq(F_14(x, k_0), (-k_0*F_8(x, k_0) + F_8(x, 1))/(1 - k_0))
Eq(F_15(x, k_0), F_16(x, k_0))
Eq(F_16(x, k_0), F_17(x, k_0)*F_24(x))
Eq(F_17(x, k_0), F_18(x, k_0) + F_25(x, k_0) + F_7(x))
Eq(F_18(x, k_0), F_19(x, k_0))
Eq(F_19(x, k_0), F_0(x)*F_10(x, k_0)*F_20(x, k_0)*F_22(x))
Eq(F_20(x, k_0), F_1(x) + F_21(x, k_0))
Eq(F_21(x, k_0), F_10(x, k_0)*F_20(x, k_0))
Eq(F_22(x), F_1(x) + F_23(x))
Eq(F_23(x), F_22(x)*F_24(x))
Eq(F_24(x), F_10(x, 1))
Eq(F_25(x, k_0), F_26(x, k_0))
Eq(F_26(x, k_0), F_0(x)*F_20(x, k_0)*F_22(x)*F_24(x)*F_27(x))
Eq(F_27(x), F_1(x) + F_28(x))
Eq(F_28(x), F_24(x)*F_27(x))
Eq(F_29(x, k_0), F_24(x)*F_30(x, k_0))
Eq(F_30(x, k_0), (-k_0*F_12(x, k_0) + F_12(x, 1))/(1 - k_0))
Eq(F_31(x), F_32(x))
Eq(F_32(x), F_0(x)*F_24(x)*F_33(x))
Eq(F_33(x), F_34(x) + F_37(x))
Eq(F_34(x), F_1(x) + F_35(x))
Eq(F_35(x), F_36(x))
Eq(F_36(x), F_24(x)*F_33(x))
Eq(F_37(x), F_28(x))
Eq(F_38(x), F_11(x, 1))
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, 1, 3], "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, 2, 0, 3], "pos": [[0, 0], [0, 0], [0, 0], [0, 0]]}, {"patt": [2, 0, 1, 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], 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