E.g.f.: Sum_{n>=1} x^(n^2) * exp(x^n) / n!.

Terms

a(0) =1a(1) =2a(2) =3a(3) =16a(4) =5a(5) =366a(6) =7a(7) =10088a(8) =60489a(9) =302410a(10) =11a(11) =89812812a(12) =13a(13) =363242894a(14) =108972864015a(15) =886312627216a(16) =17a(18) =19a(22) =23