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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.

A266258 Number of OFF (white) 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 0
1 2
2 3
3 2
4 7
5 2
6 11
7 2
8 15
9 2
10 19
11 2
12 23
13 2
14 27
15 2
16 31
17 2
18 35
19 2
20 39
21 2
22 43
23 2
24 47
25 2
26 51
27 2
28 55
29 2
30 59
31 2
32 63
33 2
34 67
35 2
36 71
37 2
38 75
39 2
40 79
41 2
42 83
43 2
44 87
45 2
46 91
47 2
48 95
49 2
50 99
51 2
52 103
53 2
54 107
55 2
56 111
57 2
58 115
59 2
60 119
61 2
62 123
63 2
64 127
65 2
66 131
67 2
68 135
69 2
70 139
71 2

List of values

[0, 2, 3, 2, 7, 2, 11, 2, 15, 2, 19, 2, 23, 2, 27, 2, 31, 2, 35, 2, 39, 2, 43, 2, 47, 2, 51, 2, 55, 2, 59, 2, 63, 2, 67, 2, 71, 2, 75, 2, 79, 2, 83, 2, 87, 2, 91, 2, 95, 2, 99, 2, 103, 2, 107, 2, 111, 2, 115, 2, 119, 2, 123, 2, 127, 2, 131, 2, 135, 2, 139, 2]

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