59990

Appears in sequences

• Number of ordered quadruples of integers from [ 2,n ] with no global factor.at n=33A015638
• a(n) = 49*n^2 - n.at n=34A157923
• a(n) = 1225*n^2 - 35.at n=6A158735
• Triangle read by rows: T(n,k) is the number of labeled simple graphs with n edges and k vertices and without endpoints or isolated vertices.at n=42A369931