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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.

A340644 The number of vertices on a Reuleaux 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 19
3 120
4 442
5 1332
6 2863
7 5871
8 10171
9 17358
10 26518
11 40590
12 57757
13 81735
14 110209
15 148158
16 192184
17 248772
18 313105
19 393429
20 483283
21 593490
22 715528
23 861660
24 1022281
25 1211811
26 1418515
27 1659108
28 1919842
29 2220204
30 2543527
31 2912751
32 3308305
33 3755922
34 4233730
35 4770150
36 5340529
37 5977071

List of values

[3, 19, 120, 442, 1332, 2863, 5871, 10171, 17358, 26518, 40590, 57757, 81735, 110209, 148158, 192184, 248772, 313105, 393429, 483283, 593490, 715528, 861660, 1022281, 1211811, 1418515, 1659108, 1919842, 2220204, 2543527, 2912751, 3308305, 3755922, 4233730, 4770150, 5340529, 5977071]

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

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