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.

A340686 The number of vertices on a concave circular triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

Table of values

n a(n)
1 3
2 10
3 24
4 76
5 168
6 391
7 819
8 1447
9 2949
10 4153
11 6393
12 8293
13 12048
14 14857
15 20670
16 25972
17 33123
18 41026
19 50379
20 63700
21 76560
22 96628
23 113262
24 135076
25 160050
26 183484
27 215355
28 244435
29 288861
30 322276
31 371742
32 424279
33 470838
34 534376
35 597033
36 682264
37 760959
38 854755
39 941706
40 1039255
41 1141569
42 1254190

List of values

[3, 10, 24, 76, 168, 391, 819, 1447, 2949, 4153, 6393, 8293, 12048, 14857, 20670, 25972, 33123, 41026, 50379, 63700, 76560, 96628, 113262, 135076, 160050, 183484, 215355, 244435, 288861, 322276, 371742, 424279, 470838, 534376, 597033, 682264, 760959, 854755, 941706, 1039255, 1141569, 1254190]

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

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