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

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =21a(5) =116a(6) =805a(7) =6504a(8) =59353a(9) =608320a(10) =6901641a(11) =85824080a(12) =1160786341a(13) =16959401304a(14) =266133942061