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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.

A008351 a(n) is the concatenation of a(n-1) and a(n-2) with a(1)=1, a(2)=2.

Table of values

n a(n)
1 1
2 2
3 21
4 212
5 21221
6 21221212
7 2122121221221
8 212212122122121221212
9 2122121221221212212122122121221221
10 2122121221221212212122122121221221212212122122121221212

List of values

[1, 2, 21, 212, 21221, 21221212, 2122121221221, 212212122122121221212, 2122121221221212212122122121221221, 2122121221221212212122122121221221212212122122121221212]

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

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