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

Terms

a(0) =1a(1) =1a(2) =4a(3) =13a(4) =37a(5) =112a(6) =337a(7) =1009a(8) =3028a(9) =9085a(10) =27253a(11) =81760a(12) =245281a(13) =735841a(14) =2207524a(15) =6622573a(16) =19867717a(17) =59603152a(18) =178809457a(19) =536428369a(20) =1609285108a(21) =4827855325a(22) =14483565973a(23) =43450697920a(24) =130352093761a(25) =391056281281