a(n) = exp(-1) * Sum_{k>=0} (k + n - 1)!^n/(k!*(k - 1)!^n).
A308537
a(n) = exp(-1) * Sum_{k>=0} (k + n - 1)!^n/(k!*(k - 1)!^n).
Terms
- a(0) =1a(1) =1a(2) =27a(3) =104149a(4) =192052025697
External references
- oeis: A308537
A308537
a(n) = exp(-1) * Sum_{k>=0} (k + n - 1)!^n/(k!*(k - 1)!^n).