123250

Appears in sequences

• Numbers n that are the hypotenuse of exactly 31 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 31 ways.at n=16A097244
• Expansion of (1/x) * Series_Reversion( x * (1 - x * (1 + x)^3) / (1 + x) ).at n=7A389438