36385

Appears in sequences

• E.g.f. A(x) satisfies: A(x) = (1 + x) * Product_{k>=2} A(x^k)^(1/k).at n=8A309175
• Records in A171898.at n=24A309813
• 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=22A357301
• Draw a regular n-gon and the enclosing circle, then for each pair of vertices X, Y, draw a circle with diameter XY; the union of these figures is the graph H_n; sequence gives number of edges in H_n.at n=18A370979