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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.

A263807 Total number of ON (black) cells after n iterations of the "Rule 157" elementary cellular automaton starting with a single ON (black) cell.

Table of values

n a(n)
0 1
1 3
2 6
3 11
4 17
5 25
6 34
7 45
8 57
9 71
10 86
11 103
12 121
13 141
14 162
15 185
16 209
17 235
18 262
19 291
20 321
21 353
22 386
23 421
24 457
25 495
26 534
27 575
28 617
29 661
30 706
31 753
32 801
33 851
34 902
35 955
36 1009
37 1065
38 1122
39 1181
40 1241
41 1303
42 1366
43 1431
44 1497
45 1565
46 1634
47 1705
48 1777
49 1851
50 1926

List of values

[1, 3, 6, 11, 17, 25, 34, 45, 57, 71, 86, 103, 121, 141, 162, 185, 209, 235, 262, 291, 321, 353, 386, 421, 457, 495, 534, 575, 617, 661, 706, 753, 801, 851, 902, 955, 1009, 1065, 1122, 1181, 1241, 1303, 1366, 1431, 1497, 1565, 1634, 1705, 1777, 1851, 1926]

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

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