a(n) = Sum_{k>=0} (k+n)!^n/((k+n)!*(k!^n)*exp(1)).
A070227
a(n) = Sum_{k>=0} (k+n)!^n/((k+n)!*(k!^n)*exp(1)).
Terms
- a(0) =1a(1) =1a(2) =7a(3) =2971a(4) =326922081
External references
- oeis: A070227
A070227
a(n) = Sum_{k>=0} (k+n)!^n/((k+n)!*(k!^n)*exp(1)).