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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.

A211029 Triangle read by rows in which row n lists the binary words of length n over the alphabet {1,2} with no initial repeats.

Table of values

n a(n)
1 1
2 2
3 12
4 21
5 121
6 122
7 211
8 212
9 1211
10 1221
11 1222
12 2111
13 2112
14 2122
15 12111
16 12112
17 12211
18 12212
19 12221
20 12222
21 21111
22 21112
23 21121
24 21122
25 21221
26 21222
27 121111
28 121112
29 121122
30 122111
31 122112
32 122121
33 122211
34 122212
35 122221
36 122222
37 211111
38 211112

List of values

[1, 2, 12, 21, 121, 122, 211, 212, 1211, 1221, 1222, 2111, 2112, 2122, 12111, 12112, 12211, 12212, 12221, 12222, 21111, 21112, 21121, 21122, 21221, 21222, 121111, 121112, 121122, 122111, 122112, 122121, 122211, 122212, 122221, 122222, 211111, 211112]

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

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