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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.

A173456 Number of "ON" cells at n-th stage in simple 2-dimensional cellular automaton (see Comments for precise definition).

Table of values

n a(n)
0 0
1 1
2 9
3 21
4 25
5 53
6 89
7 93
8 121
9 157
10 169
11 253
12 361
13 365
14 393
15 429
16 441
17 525
18 633
19 645
20 729
21 837
22 873
23 1125
24 1449
25 1453
26 1481
27 1517
28 1529
29 1613
30 1721
31 1733
32 1817
33 1925
34 1961
35 2213
36 2537
37 2549
38 2633
39 2741
40 2777
41 3029
42 3353
43 3389
44 3641
45 3965
46 4073
47 4829
48 5801

List of values

[0, 1, 9, 21, 25, 53, 89, 93, 121, 157, 169, 253, 361, 365, 393, 429, 441, 525, 633, 645, 729, 837, 873, 1125, 1449, 1453, 1481, 1517, 1529, 1613, 1721, 1733, 1817, 1925, 1961, 2213, 2537, 2549, 2633, 2741, 2777, 3029, 3353, 3389, 3641, 3965, 4073, 4829, 5801]

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

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