a(n) = Sum_{k=0..n} (-1)^(n-k) * k! * k^(3*n) * Stirling1(n,k).

A351137

a(n) = Sum_{k=0..n} (-1)^(n-k) * k! * k^(3*n) * Stirling1(n,k).

Terms

    a(0) =1a(1) =1a(2) =129a(3) =121172a(4) =421875178

External references