190609

Appears in sequences

• Expansion of (2+9*x-24*x^3+16*x^4-30*x^2) / ((1-x)*(2*x+1)*(2*x-1)*(4*x^2+4*x-1)).at n=7A110050
• a(n) is the number of distinct radii of circles passing through at least three points in a square grid of n X n points.at n=33A357301