a(n) = (n!)^n * [x^n] exp(Sum_{k>=1} x^k / k^n).

A336441

a(n) = (n!)^n * [x^n] exp(Sum_{k>=1} x^k / k^n).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =71a(4) =30232a(5) =435772624

External references