a(n) = Sum_{k=0..n} C(n,k)*|Stirling1(n,k)*Stirling2(n,k)|.
A047794
a(n) = Sum_{k=0..n} C(n,k)*|Stirling1(n,k)*Stirling2(n,k)|.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =34a(4) =631a(5) =16871a(6) =617356a(7) =28968990a(8) =1680536159a(9) =117572734195
External references
- oeis: A047794