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.

A335701 Irregular triangle read by rows: consider the structure formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of an (n+1) X 3 rectangular grid of points (or equally, an n X 2 grid of squares); row n gives number of cells with k sides, for k >= 3.

Table of values

n a(n)
1 14
2 2
3 48
4 8
5 102
6 36
7 4
8 192
9 92
10 12
11 326
12 194
13 24
14 524
15 336
16 28
17 4
18 802
19 554
20 80
21 1192
22 812
23 128
24 4
25 1634
26 1314
27 112
28 0
29 4
30 2
31 2296
32 1756
33 200
34 20
35 3074
36 2508
37 236
38 22
39 4052
40 3252
41 356
42 28
43 5246
44 4348
45 472
46 28
47 6740
48 5464
49 652
50 28
51 8398
52 7054
53 656
54 74
55 10440
56 8760
57 940
58 52
59 12770
60 11050
61 1040
62 58
63 15512
64 13324
65 1300
66 60
67 4
68 18782
69 16162
70 1600
71 70
72 22384
73 19256
74 1948
75 104

List of values

[14, 2, 48, 8, 102, 36, 4, 192, 92, 12, 326, 194, 24, 524, 336, 28, 4, 802, 554, 80, 1192, 812, 128, 4, 1634, 1314, 112, 0, 4, 2, 2296, 1756, 200, 20, 3074, 2508, 236, 22, 4052, 3252, 356, 28, 5246, 4348, 472, 28, 6740, 5464, 652, 28, 8398, 7054, 656, 74, 10440, 8760, 940, 52, 12770, 11050, 1040, 58, 15512, 13324, 1300, 60, 4, 18782, 16162, 1600, 70, 22384, 19256, 1948, 104]