A385162 Place a point on the integer coordinates, up to |n|, along all four axial directions on a Cartesian plane, and then join a circle through every unordered triple of non-collinear points: a(n) is the number of distinct (curved) edges formed from the intersections of the circles.
4, 184, 8956, 79272, 455664, 1420624, 4576632
Offset: 1
Links
- Scott R. Shannon, Image for n = 2. The 4 x 2 = 8 starting points are shown as white dots.
