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

Terms

a(0) =1a(1) =1a(2) =5a(3) =10a(4) =32a(5) =79a(6) =224a(7) =589a(8) =1613a(9) =4321a(10) =11714a(11) =31552a(12) =85283a(13) =230080a(14) =621353a(15) =1677097a(16) =4528013a(17) =12223258a(18) =32999264a(19) =89084263a(20) =240496544a(21) =649248085a(22) =1752733013a(23) =4731720649a(24) =12773896082a(25) =34484755072a(26) =93096036443