812500

Appears in sequences

• Numbers that are the sum of 2 nonzero squares in exactly 7 ways.at n=13A025290
• Numbers that are the sum of 2 distinct nonzero squares in exactly 7 ways.at n=15A025308
• Hypotenuses for which there exist exactly 19 distinct integer triangles.at n=9A290505
• a(n) is the square of the side length of a simplex whose n-dimensional inner hypervolume is equal to its (n-1)-dimensional surface hypervolume. As a result, the sequence starts at n=2.at n=23A364922
• a(n) = Sum_{-n <= a, b, c <= n} (b^2 - 4*a*c).at n=11A385029