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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.

A140106 Number of noncongruent diagonals in a regular n-gon.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 1
6 2
7 2
8 3
9 3
10 4
11 4
12 5
13 5
14 6
15 6
16 7
17 7
18 8
19 8
20 9
21 9
22 10
23 10
24 11
25 11
26 12
27 12
28 13
29 13
30 14
31 14
32 15
33 15
34 16
35 16
36 17
37 17
38 18
39 18
40 19
41 19
42 20
43 20
44 21
45 21
46 22
47 22
48 23
49 23
50 24
51 24
52 25
53 25
54 26
55 26
56 27
57 27
58 28
59 28
60 29
61 29
62 30
63 30
64 31
65 31
66 32
67 32
68 33
69 33
70 34
71 34
72 35
73 35
74 36
75 36
76 37

List of values

[0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37]

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