a(n) = Sum_{k=0..n} (-1)^(n-k)*k^n*Stirling1(n,k).
A128943
a(n) = Sum_{k=0..n} (-1)^(n-k)*k^n*Stirling1(n,k).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =53a(4) =924a(5) =23494a(6) =810872a(7) =36194514a(8) =2017775680a(9) =136829739216
External references
- oeis: A128943