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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.

A333117 The number of vertices inside a pentagram 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 26
2 866
3 6771
4 24221
5 64306
6 132701
7 259761
8 453016
9 734131
10 1134081
11 1673056
12 2384606
13 3326391
14 4478286
15 5941196
16 7710796
17 9901136
18 12407581
19 15497721
20 19088991
21 23256266
22 28021386
23 33537586
24 39846196
25 47092241
26 55136771
27 64103776
28 74213991
29 85642556
30 98039461

List of values

[26, 866, 6771, 24221, 64306, 132701, 259761, 453016, 734131, 1134081, 1673056, 2384606, 3326391, 4478286, 5941196, 7710796, 9901136, 12407581, 15497721, 19088991, 23256266, 28021386, 33537586, 39846196, 47092241, 55136771, 64103776, 74213991, 85642556, 98039461]

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

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