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

Terms

a(0) =1a(1) =1a(2) =4a(3) =9a(4) =27a(5) =74a(6) =215a(7) =619a(8) =1808a(9) =5293a(10) =15579a(11) =45986a(12) =136141a(13) =403937a(14) =1200854a(15) =3575835a(16) =10663105a(17) =31836508a(18) =95156251a(19) =284684303a(20) =852427700a(21) =2554346249a(22) =7659427811a(23) =22981483554a(24) =68992151795a(25) =207223579671a(26) =622697586944