a(n) = Sum_{k=0..n-1} C(n-1,k)^(k+1) * n/(n-k).
A181075
a(n) = Sum_{k=0..n-1} C(n-1,k)^(k+1) * n/(n-k).
Terms
- a(0) =1a(1) =3a(2) =10a(3) =71a(4) =1026a(5) =30912a(6) =2219946a(7) =339460991a(8) =112986526834
External references
- oeis: A181075
A181075
a(n) = Sum_{k=0..n-1} C(n-1,k)^(k+1) * n/(n-k).