Expansion of e.g.f. exp(x/(1 - x^4)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =121a(6) =721a(7) =2521a(8) =6721a(9) =378001a(10) =5473441a(11) =39972241a(12) =199679041a(13) =7005552841a(14) =176899522801