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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.

A111081 Successive generations of an alternating Kolakoski rule.

Table of values

n a(n)
1 1
2 2
3 11
4 21
5 221
6 22112
7 11221211
8 21221121121
9 2212211212212112
10 1122122112122122112112122
11 12112212211212212211211221211212212211
12 211212211211221211211221221121221211221221211211221221121

List of values

[1, 2, 11, 21, 221, 22112, 11221211, 21221121121, 2212211212212112, 1122122112122122112112122, 12112212211212212211211221211212212211, 211212211211221211211221221121221211221221211211221221121]

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

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