Expansion of e.g.f. exp(exp(x) - 1 + x^3/6).

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =19a(5) =72a(6) =313a(7) =1472a(8) =7612a(9) =42679a(10) =255515a(11) =1632710a(12) =11065057a(13) =79065807a(14) =594174922a(15) =4679473130a(16) =38500353667a(17) =330172915164