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.

A146212 Number of intersection points of all lines through pairs of vertices of a regular n-gon.

Table of values

n a(n)
3 3
4 5
5 15
6 37
7 91
8 145
9 333
10 471
11 891
12 901
13 1963
14 2185
15 3795
16 3969
17 6681
18 5563
19 10963
20 11141
21 17031
22 17293
23 25323
24 21913
25 36325
26 36479
27 50571
28 50485
29 68643
30 51661
31 91171
32 90753
33 118833
34 118355
35 152355
36 139861
37 192511
38 191445
39 240123
40 238481

List of values

[3, 5, 15, 37, 91, 145, 333, 471, 891, 901, 1963, 2185, 3795, 3969, 6681, 5563, 10963, 11141, 17031, 17293, 25323, 21913, 36325, 36479, 50571, 50485, 68643, 51661, 91171, 90753, 118833, 118355, 152355, 139861, 192511, 191445, 240123, 238481]

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

Content is available under The OEIS End-User License Agreement.