Expansion of 1/(1-2x-3x^4).

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =19a(5) =44a(6) =100a(7) =224a(8) =505a(9) =1142a(10) =2584a(11) =5840a(12) =13195a(13) =29816a(14) =67384a(15) =152288a(16) =344161a(17) =777770a(18) =1757692a(19) =3972248a(20) =8976979a(21) =20287268a(22) =45847612a(23) =103611968a(24) =234154873a(25) =529171550a(26) =1195885936a(27) =2702607776a(28) =6107680171a(29) =13802874992