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.

A330914 Irregular table read by rows: Take a semicircular polygon with all vertices mutually connected by straight line segments, as in A333642. Then T(n,k) = number of k-sided polygons in that figure for k >= 3.

Table of values

n a(n)
1 2
2 7
3 1
4 16
5 4
6 30
7 10
8 3
9 52
10 20
11 8
12 79
13 47
14 10
15 3
16 116
17 86
18 18
19 4
20 168
21 145
22 9
23 2
24 234
25 212
26 52
27 12
28 319
29 312
30 80
31 17
32 2
33 430
34 446
35 96
36 18
37 2
38 551
39 616
40 173
41 28
42 5
43 730
44 792
45 248
46 44
47 6
48 960
49 1035
50 167
51 25
52 1148
53 1384
54 422
55 66
56 20

List of values

[2, 7, 1, 16, 4, 30, 10, 3, 52, 20, 8, 79, 47, 10, 3, 116, 86, 18, 4, 168, 145, 9, 2, 234, 212, 52, 12, 319, 312, 80, 17, 2, 430, 446, 96, 18, 2, 551, 616, 173, 28, 5, 730, 792, 248, 44, 6, 960, 1035, 167, 25, 1148, 1384, 422, 66, 20]