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

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =2a(6) =4a(7) =9a(8) =18a(9) =39a(10) =80a(11) =169a(12) =350a(13) =731a(14) =1516a(15) =3149a(16) =6522a(17) =13503a(18) =27912a(19) =57649a(20) =118934a(21) =245155a(22) =504868a(23) =1038869a(24) =2135986a(25) =4388487a(26) =9009984a(27) =18486009a(28) =37904078a(29) =77672299