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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.

A266256 Number of ON (black) cells in the n-th iteration of the "Rule 11" elementary cellular automaton starting with a single ON (black) cell.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 2
5 9
6 2
7 13
8 2
9 17
10 2
11 21
12 2
13 25
14 2
15 29
16 2
17 33
18 2
19 37
20 2
21 41
22 2
23 45
24 2
25 49
26 2
27 53
28 2
29 57
30 2
31 61
32 2
33 65
34 2
35 69
36 2
37 73
38 2
39 77
40 2
41 81
42 2
43 85
44 2
45 89
46 2
47 93
48 2
49 97
50 2
51 101
52 2
53 105
54 2
55 109
56 2
57 113
58 2
59 117
60 2
61 121
62 2
63 125
64 2
65 129
66 2
67 133
68 2
69 137
70 2
71 141

List of values

[1, 1, 2, 5, 2, 9, 2, 13, 2, 17, 2, 21, 2, 25, 2, 29, 2, 33, 2, 37, 2, 41, 2, 45, 2, 49, 2, 53, 2, 57, 2, 61, 2, 65, 2, 69, 2, 73, 2, 77, 2, 81, 2, 85, 2, 89, 2, 93, 2, 97, 2, 101, 2, 105, 2, 109, 2, 113, 2, 117, 2, 121, 2, 125, 2, 129, 2, 133, 2, 137, 2, 141]

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