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.

A374827 Place n equally spaced points on the circumference of a circle of radius r and then connect each pair of points with straight lines whose intersections create A007569(n) - n additional points. Draw a circle of radius r around each of the A007569(n) points. The sequence gives the total number of curved edges formed from all circle intersections.

Table of values

n a(n)
1 1
2 2
3 9
4 28
5 150
6 636
7 3290
8 6192
9 35145
10 57380
11 230494
12 192588
13 1055535
14 1177148

List of values

[1, 2, 9, 28, 150, 636, 3290, 6192, 35145, 57380, 230494, 192588, 1055535, 1177148]

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

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