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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.

A165300 a(n) is the smallest number not already present that permits the cyclic repetition of the path 1,2 of the digits in the sequence.

Table of values

n a(n)
1 1
2 2
3 12
4 121
5 21
6 212
7 1212
8 12121
9 2121
10 21212
11 121212
12 1212121
13 212121
14 2121212
15 12121212
16 121212121
17 21212121
18 212121212
19 1212121212
20 12121212121
21 2121212121
22 21212121212
23 121212121212
24 1212121212121
25 212121212121

List of values

[1, 2, 12, 121, 21, 212, 1212, 12121, 2121, 21212, 121212, 1212121, 212121, 2121212, 12121212, 121212121, 21212121, 212121212, 1212121212, 12121212121, 2121212121, 21212121212, 121212121212, 1212121212121, 212121212121]

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

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