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.

A262620 Number of "ON" cells at n-th stage in simple 2-dimensional cellular automaton on the square grid (see Comments lines for definition).

Table of values

n a(n)
0 1
1 5
2 17
3 21
4 49
5 69
6 81
7 85
8 145
9 197
10 241
11 277
12 305
13 325
14 337
15 341
16 465
17 581
18 689
19 789
20 881
21 965
22 1041
23 1109
24 1169
25 1221
26 1265
27 1301
28 1329
29 1349
30 1361
31 1365
32 1617
33 1861
34 2097
35 2325
36 2545
37 2757
38 2961
39 3157
40 3345
41 3525
42 3697
43 3861
44 4017
45 4165
46 4305
47 4437
48 4561
49 4677
50 4785
51 4885
52 4977
53 5061
54 5137
55 5205
56 5265
57 5317
58 5361
59 5397

List of values

[1, 5, 17, 21, 49, 69, 81, 85, 145, 197, 241, 277, 305, 325, 337, 341, 465, 581, 689, 789, 881, 965, 1041, 1109, 1169, 1221, 1265, 1301, 1329, 1349, 1361, 1365, 1617, 1861, 2097, 2325, 2545, 2757, 2961, 3157, 3345, 3525, 3697, 3861, 4017, 4165, 4305, 4437, 4561, 4677, 4785, 4885, 4977, 5061, 5137, 5205, 5265, 5317, 5361, 5397]