162500

Appears in sequences

• Concatenations of two squares in two ways.at n=17A038670
• Numbers j that are the hypotenuse of exactly 16 distinct integer-sided right triangles, i.e., j^2 can be written as a sum of two squares in 16 ways.at n=9A097238
• Number of ways to place 2 nonattacking amazons (superqueens) on an n X n toroidal board.at n=24A178972
• Numbers that are in more than one way the concatenation of the decimal representation of two nonzero squares.at n=17A192993
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. exp(exp(k*x)-1).at n=60A292913
• a(n) = n! * [x^n] exp(exp(n*x)-1).at n=5A292914
• Terms of A301517 that are not exponentially odd numbers (A268335).at n=14A335989
• Numbers whose square can be represented in exactly three ways as the sum of a positive square and a positive fourth power.at n=15A345968