Expansion of e.g.f. exp(exp(x) - 1 + x^2/2).

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =117a(6) =533a(7) =2599a(8) =13919a(9) =79620a(10) =487810a(11) =3167265a(12) =21744187a(13) =157020697a(14) =1189321019a(15) =9417789650a(16) =77774264012a(17) =668233623419