cp's OEIS Frontend

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.

A385161 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 (finite) regions created.

Table of values

n a(n)
1 1
2 117
3 4713
4 41173
5 233365
6 725081
7 2323869

List of values

[1, 117, 4713, 41173, 233365, 725081, 2323869]

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

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