a(n) = (n^13 - n)/13.

A366489

a(n) = (n^13 - n)/13.

Terms

    a(0) =0a(1) =0a(2) =630a(3) =122640a(4) =5162220a(5) =93900240a(6) =1004668770a(7) =7453000800a(8) =42288908760a(9) =195528140640a(10) =769230769230

External references