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

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =13a(5) =31a(6) =70a(7) =169a(8) =421a(9) =1036a(10) =2521a(11) =6139a(12) =14998a(13) =36661a(14) =89545a(15) =218644a(16) =533941a(17) =1304071a(18) =3184966a(19) =7778449a(20) =18996733a(21) =46394716a(22) =113307745a(23) =276726019a(24) =675833686a(25) =1650553981a(26) =4031064961a(27) =9844867684a(28) =24043624093a(29) =58720529071