Sixth column of triangle A067417.

A067421

Sixth column of triangle A067417.

Terms

    a(0) =1a(1) =8a(2) =144a(3) =2592a(4) =46656a(5) =839808a(6) =15116544a(7) =272097792a(8) =4897760256a(9) =88159684608

External references