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

Terms

a(0) =1a(1) =1a(2) =2a(3) =8a(4) =32a(5) =160a(6) =1000a(7) =7000a(8) =56000a(9) =506240a(10) =5062400a(11) =55686400a(12) =668483200a(13) =8690281600a(14) =121663942400