Expansion of x/((1-x-x^3)*(1-x)^6).

Terms

a(0) =0a(1) =1a(2) =7a(3) =28a(4) =85a(5) =218a(6) =498a(7) =1045a(8) =2055a(9) =3840a(10) =6887a(11) =11945a(12) =20153a(13) =33228a(14) =53741a(15) =85522a(16) =134254a(17) =208344a(18) =320200a(19) =488103a(20) =738951a(21) =1112281a(22) =1666164a(23) =2485845a(24) =3696406a(25) =5481325a(26) =8109676a(27) =11975993a(28) =17658694a(29) =26005706