cp's OEIS Frontend

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.

A138721 Concatenation of n digits 1, n digits 0 and n digits 1.

Table of values

n a(n)
1 101
2 110011
3 111000111
4 111100001111
5 111110000011111
6 111111000000111111
7 111111100000001111111
8 111111110000000011111111
9 111111111000000000111111111
10 111111111100000000001111111111
11 111111111110000000000011111111111
12 111111111111000000000000111111111111

List of values

[101, 110011, 111000111, 111100001111, 111110000011111, 111111000000111111, 111111100000001111111, 111111110000000011111111, 111111111000000000111111111, 111111111100000000001111111111, 111111111110000000000011111111111, 111111111111000000000000111111111111]

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

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