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

Terms

a(0) =1a(1) =0a(2) =4a(3) =6a(4) =20a(5) =49a(6) =132a(7) =344a(8) =908a(9) =2384a(10) =6273a(11) =16492a(12) =43372a(13) =114050a(14) =299916a(15) =788673a(16) =2073944a(17) =5453760a(18) =14341528a(19) =37713312a(20) =99173121a(21) =260791400a(22) =685792228a(23) =1803399102a(24) =4742323108a(25) =12470688497a(26) =32793647356a(27) =86236081272a(28) =226771411940a(29) =596331286320