Expansion of x*(1 + 2*x - 3*x^2 + 4*x^3) / (1 - x - x^2 + x^3 - x^4).

Terms

a(0) =0a(1) =1a(2) =3a(3) =1a(4) =7a(5) =6a(6) =15a(7) =15a(8) =31a(9) =37a(10) =68a(11) =89a(12) =151a(13) =209a(14) =339a(15) =486a(16) =767a(17) =1123a(18) =1743a(19) =2585a(20) =3972a(21) =5937a(22) =9067a(23) =13617a(24) =20719a(25) =31206a(26) =47375a(27) =71479a(28) =108367a(29) =163677