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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.

A266223 Total number of OFF (white) cells after n iterations of the "Rule 7" elementary cellular automaton starting with a single ON (black) cell.

Table of values

n a(n)
0 0
1 1
2 6
3 6
4 15
5 15
6 28
7 28
8 45
9 45
10 66
11 66
12 91
13 91
14 120
15 120
16 153
17 153
18 190
19 190
20 231
21 231
22 276
23 276
24 325
25 325
26 378
27 378
28 435
29 435
30 496
31 496
32 561
33 561
34 630
35 630
36 703
37 703
38 780
39 780
40 861
41 861
42 946
43 946
44 1035
45 1035
46 1128
47 1128
48 1225
49 1225
50 1326
51 1326
52 1431

List of values

[0, 1, 6, 6, 15, 15, 28, 28, 45, 45, 66, 66, 91, 91, 120, 120, 153, 153, 190, 190, 231, 231, 276, 276, 325, 325, 378, 378, 435, 435, 496, 496, 561, 561, 630, 630, 703, 703, 780, 780, 861, 861, 946, 946, 1035, 1035, 1128, 1128, 1225, 1225, 1326, 1326, 1431]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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