a(n) = Sum_{k=1..n} k^2*Bernoulli(k-1)*C(2*n-1,k)*Stirling2(2*n-k,n).
A256018
a(n) = Sum_{k=1..n} k^2*Bernoulli(k-1)*C(2*n-1,k)*Stirling2(2*n-k,n).
Terms
- a(0) =1a(1) =3a(2) =20a(3) =245a(4) =4494a(5) =110187a(6) =3383666a(7) =124856160a(8) =5380031514a(9) =265119271131
External references
- oeis: A256018