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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.

A068490 Fixed point of the morphism 1 -> 121, 2 -> 12, starting from 1.

Table of values

n a(n)
1 1
2 121
3 12112121
4 121121211211212112121
5 1211212112112121121211211212112112121121211211212112121
6 121121211211212112121121121211211212112121121121211212112112121121121211212112112121121121211212112112121121211211212112112121121211211212112121

List of values

[1, 121, 12112121, 121121211211212112121, 1211212112112121121211211212112112121121211211212112121, 121121211211212112121121121211211212112121121121211212112112121121121211212112112121121121211212112112121121211211212112112121121211211212112121]

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

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