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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A385160 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 points where circles intersect.

Table of values

n a(n)
1 4
2 68
3 4244
4 38100
5 222300
6 695544
7 2252764

List of values

[4, 68, 4244, 38100, 222300, 695544, 2252764]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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