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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.

A235609 List of privileged words over the alphabet {1,2}.

Table of values

n a(n)
1 1
2 2
3 11
4 22
5 111
6 121
7 212
8 222
9 1111
10 1221
11 2112
12 2222
13 11111
14 11211
15 12121
16 12221
17 21112
18 21212
19 22122
20 22222
21 111111
22 112211
23 121121
24 122221
25 211112
26 212212
27 221122
28 222222
29 1111111
30 1112111
31 1121211
32 1122211
33 1211121
34 1212121
35 1221221
36 1222221
37 2111112

List of values

[1, 2, 11, 22, 111, 121, 212, 222, 1111, 1221, 2112, 2222, 11111, 11211, 12121, 12221, 21112, 21212, 22122, 22222, 111111, 112211, 121121, 122221, 211112, 212212, 221122, 222222, 1111111, 1112111, 1121211, 1122211, 1211121, 1212121, 1221221, 1222221, 2111112]

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

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