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

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =82a(5) =249a(6) =756a(7) =2295a(8) =6967a(9) =21150a(10) =64206a(11) =194913a(12) =591706a(13) =1796268a(14) =5453010a(15) =16553943a(16) =50253535a(17) =152556873a(18) =463123629a(19) =1405924830a(20) =4268028025a(21) =12956640948a(22) =39333046473a(23) =119405064249a(24) =362483220772