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.

A027927 Number of plane regions after drawing (in general position) a convex n-gon and all its diagonals.

Table of values

n a(n)
2 1
3 2
4 5
5 12
6 26
7 51
8 92
9 155
10 247
11 376
12 551
13 782
14 1080
15 1457
16 1926
17 2501
18 3197
19 4030
20 5017
21 6176
22 7526
23 9087
24 10880
25 12927
26 15251
27 17876
28 20827
29 24130
30 27812
31 31901
32 36426
33 41417
34 46905
35 52922
36 59501
37 66676
38 74482
39 82955
40 92132
41 102051
42 112751
43 124272
44 136655
45 149942
46 164176
47 179401

List of values

[1, 2, 5, 12, 26, 51, 92, 155, 247, 376, 551, 782, 1080, 1457, 1926, 2501, 3197, 4030, 5017, 6176, 7526, 9087, 10880, 12927, 15251, 17876, 20827, 24130, 27812, 31901, 36426, 41417, 46905, 52922, 59501, 66676, 74482, 82955, 92132, 102051, 112751, 124272, 136655, 149942, 164176, 179401]

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

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