a(n) = Sum_{k=0..n} k! * k^(k*n) * Stirling2(n,k).

A351117

a(n) = Sum_{k=0..n} k! * k^(k*n) * Stirling2(n,k).

Terms

    a(0) =1a(1) =1a(2) =33a(3) =118483a(4) =103098350565

External references