E.g.f.: exp(Sum_{n>=1} A038500(n) * x^n).

Terms

a(0) =1a(1) =1a(2) =3a(3) =25a(4) =121a(5) =861a(6) =10051a(7) =88453a(8) =972945a(9) =16663321a(10) =205667011a(11) =3069838641a(12) =61038456073a(13) =997387656565