a(n) = exp(-n) * Sum_{k>=0} n^k * (k - 1)^n / k!.
A335867
a(n) = exp(-n) * Sum_{k>=0} n^k * (k - 1)^n / k!.
Terms
- a(0) =1a(1) =0a(2) =3a(3) =29a(4) =397a(5) =6879a(6) =144751a(7) =3587100a(8) =102351929a(9) =3305310065a(10) =119186370091
External references
- oeis: A335867