a(n) = exp(-1) * Sum_{k>=0} (n*k - 1)^n / k!.
A330605
a(n) = exp(-1) * Sum_{k>=0} (n*k - 1)^n / k!.
Terms
- a(0) =1a(1) =0a(2) =5a(3) =89a(4) =2737a(5) =121399a(6) =7316101a(7) =572218716a(8) =56142822849
External references
- oeis: A330605
A330605
a(n) = exp(-1) * Sum_{k>=0} (n*k - 1)^n / k!.