S2(j,2j+2) where S2(n,k) is a 2-associated Stirling number of the second kind.

A000497

S2(j,2j+2) where S2(n,k) is a 2-associated Stirling number of the second kind.

Terms

    a(0) =1a(1) =25a(2) =490a(3) =9450a(4) =190575a(5) =4099095a(6) =94594500a(7) =2343240900a(8) =62199262125

External references