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

A293847

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

Terms

    a(0) =1a(1) =1a(2) =5a(3) =49a(4) =793a(5) =19361a(6) =672061a(7) =31721425a(8) =1963804529a(9) =154746407233

External references