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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.

A135479 Sorted list of primitive strings that can be obtained by starting with 123 and repeatedly doubling any substring in place.

Table of values

n a(n)
1 123
2 12123
3 12323
4 123123
5 1212123
6 1212323
7 1232323
8 12123123
9 12312123
10 12312323
11 12313123
12 12323123
13 121212123
14 121212323
15 121232123
16 121232323
17 123123123
18 123212323
19 123232323
20 1212123123
21 1212312123
22 1212312323
23 1212313123
24 1212323123
25 1231212123

List of values

[123, 12123, 12323, 123123, 1212123, 1212323, 1232323, 12123123, 12312123, 12312323, 12313123, 12323123, 121212123, 121212323, 121232123, 121232323, 123123123, 123212323, 123232323, 1212123123, 1212312123, 1212312323, 1212313123, 1212323123, 1231212123]

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

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