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.

A331929 The number of regions inside a pentagon 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 11
2 170
3 1161
4 3900
5 10741
6 22380
7 44491
8 76610
9 126336
10 194070
11 290651
12 410860
13 577721
14 779340
15 1035676
16 1345030
17 1730696
18 2176040
19 2724036
20 3345880
21 4087656
22 4933200
23 5921991
24 7018210
25 8300896
26 9723300
27 11339151
28 13122120
29 15150271
30 17345140
31 19843056

List of values

[11, 170, 1161, 3900, 10741, 22380, 44491, 76610, 126336, 194070, 290651, 410860, 577721, 779340, 1035676, 1345030, 1730696, 2176040, 2724036, 3345880, 4087656, 4933200, 5921991, 7018210, 8300896, 9723300, 11339151, 13122120, 15150271, 17345140, 19843056]

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

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