121680000

Appears in sequences

• a(n) = n^2*(n^2 - 1)^2/2.at n=24A288959
• Detour index for the n X n torus grid graph.at n=22A296784
• a(n) = Product_{i=1..n, j=1..n} (i^2 + j^2).at n=3A324403
• a(n) = phi(5^n+1), where phi is Euler's totient function (A000010).at n=12A366618