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

Terms

a(0) =1a(1) =2a(2) =9a(3) =34a(4) =124a(5) =444a(6) =1567a(7) =5466a(8) =18885a(9) =64732a(10) =220403a(11) =746166a(12) =2513678a(13) =8431650a(14) =28175256a(15) =93834240a(16) =311565255a(17) =1031723268a(18) =3408137644a(19) =11233323692a(20) =36950587185a(21) =121319416734a(22) =397649266199