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

Terms

a(0) =2a(1) =6a(2) =11a(3) =26a(4) =57a(5) =129a(6) =289a(7) =650a(8) =1460a(9) =3281a(10) =7372a(11) =16565a(12) =37221a(13) =83635a(14) =187926a(15) =422266a(16) =948823a(17) =2131986a(18) =4790529a(19) =10764221a(20) =24186985a(21) =54347662a(22) =122118088a(23) =274396853a(24) =616564132a(25) =1385407029a(26) =3112981337a(27) =6994805571a(28) =15717185450