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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =25a(5) =121a(6) =361a(7) =841a(8) =42001a(9) =365905a(10) =1819441a(11) =6660721a(12) =498971881a(13) =6278929801a(14) =43710250585a(15) =218205219961