1322500

Appears in sequences

• a(n) = n^2*(n+1)*(n+2)^2/6.at n=23A004256
• One quarter the number of n X n toroidal 0..3 arrays with each element having the sum of its vertical neighbors equal to the sum of its horizontal neighbors.at n=7A184100
• Numbers whose prime indices have arithmetic and geometric mean differing by one.at n=27A358332