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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.

A290113 Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 643", based on the 5-celled von Neumann neighborhood.

Table of values

n a(n)
0 1
1 3
2 5
3 13
4 29
5 61
6 125
7 253
8 509
9 1021
10 2045
11 4093
12 8189
13 16381
14 32765
15 65533
16 131069
17 262141
18 524285
19 1048573
20 2097149
21 4194301
22 8388605
23 16777213
24 33554429
25 67108861
26 134217725
27 268435453
28 536870909
29 1073741821
30 2147483645
31 4294967293
32 8589934589

List of values

[1, 3, 5, 13, 29, 61, 125, 253, 509, 1021, 2045, 4093, 8189, 16381, 32765, 65533, 131069, 262141, 524285, 1048573, 2097149, 4194301, 8388605, 16777213, 33554429, 67108861, 134217725, 268435453, 536870909, 1073741821, 2147483645, 4294967293, 8589934589]

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

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