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

A382808

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

Terms

    a(0) =1a(1) =1a(2) =9a(3) =440a(4) =71344a(5) =25826824a(6) =17321581592

External references