Expansion of g.f.: x^3*(1 + 4*x - x^2 - 6*x^3 + x^4)/(1 - 9*x^2 - 3*x^3 + 17*x^4 + 8*x^5 - 6*x^6 - 7*x^7 + x^8 - x^9).

A173652

Expansion of g.f.: x^3*(1 + 4*x - x^2 - 6*x^3 + x^4)/(1 - 9*x^2 - 3*x^3 + 17*x^4 + 8*x^5 - 6*x^6 - 7*x^7 + x^8 - x^9).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =4a(5) =8a(6) =33a(7) =68a(8) =245a(9) =549a(10) =1815a(11) =4331a(12) =13524a(13) =33766a(14) =101383a(15) =261293a(16) =763745a(17) =2011959a(18) =5774140a(19) =15440569a(20) =43764595a(21) =118231475a(22) =332290914a(23) =903952326a(24) =2526016085a(25) =6904206021a(26) =19218113777a(27) =52696460176a(28) =146294791786a(29) =402018135352

External references