Expansion of (1+x)/ ((1+x)^3-7*x).

Terms

a(0) =1a(1) =5a(2) =17a(3) =52a(4) =152a(5) =435a(6) =1232a(7) =3471a(8) =9753a(9) =27367a(10) =76738a(11) =215098a(12) =602811a(13) =1689212a(14) =4733317a(15) =13262821a(16) =37162121a(17) =104126704a(18) =291757632a(19) =817488295a(20) =2290553580a(21) =6417991803a(22) =17982818177a(23) =50386743719a(24) =141180528542a(25) =395579064834