Row sums of triangle A117262; also, self-convolution of A117264.

A117263

Row sums of triangle A117262; also, self-convolution of A117264.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =64a(4) =1729a(5) =140050a(6) =34032151a(7) =24809438080

External references