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

Terms

a(0) =1a(1) =0a(2) =3a(3) =1a(4) =9a(5) =6a(6) =28a(7) =27a(8) =90a(9) =109a(10) =297a(11) =417a(12) =1000a(13) =1548a(14) =3417a(15) =5644a(16) =11799a(17) =20349a(18) =41041a(19) =72846a(20) =143472a(21) =259579a(22) =503262a(23) =922209a(24) =1769365a(25) =3269889a(26) =6230304a(27) =11579032a(28) =21960801a(29) =40967400