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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.

A317957 Apply the morphism X -> XYX, where Y=1 if X contains an odd number of 1's, otherwise Y = 0 n times to 1, and concatenate the resulting string.

Table of values

n a(n)
0 1
1 101
2 1011101
3 101110101011101
4 1011101010111011101110101011101
5 101110101011101110111010101110101011101010111011101110101011101

List of values

[1, 101, 1011101, 101110101011101, 1011101010111011101110101011101, 101110101011101110111010101110101011101010111011101110101011101]

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

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