a(n) = n!*Sum_{k=0..n} (-1)^(n-k)*Stirling1(n,k)/k!.
A119390
a(n) = n!*Sum_{k=0..n} (-1)^(n-k)*Stirling1(n,k)/k!.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =22a(4) =301a(5) =6631a(6) =214681a(7) =9600088a(8) =566959457a(9) =42745927717
External references
- oeis: A119390