Expansion of e.g.f. 1 / (exp(-x) - x^3).

Terms

a(0) =1a(1) =1a(2) =1a(3) =7a(4) =49a(5) =241a(6) =1681a(7) =18481a(8) =192193a(9) =2028097a(10) =26854561a(11) =400419361a(12) =6074016961a(13) =100260498625