102988

Appears in sequences

• Number of right triangles on a (n+1)X8 grid.at n=33A189812
• Number of idempotent 4 X 4 0..n matrices of rank 1.at n=20A224526
• a(n) = (1/(6*n)) * Sum_{d|n} 7^(n/d-1) * phi(7*d).at n=7A364212