89985

Appears in sequences

• a(n) = n * (10*n^2 - 6n + 1) = n * A087348(n).at n=21A104099
• a(n) = 225*n^2 - 15.at n=19A158559
• a(n) = (n-1)*(n-2)*(n^2+9*n+12)/24.at n=37A323847