Expansion of c(x/(1-x)^4), c(x) the g.f. of A000108.

Terms

a(0) =1a(1) =1a(2) =6a(3) =31a(4) =166a(5) =931a(6) =5412a(7) =32334a(8) =197378a(9) =1225871a(10) =7722282a(11) =49224175a(12) =316921948a(13) =2057994779a(14) =13463417108a(15) =88650225829a(16) =587062025226