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.

A279118 Binary representation of the x-axis, from the left edge to the origin, (and also from the origin to the right edge) of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 209", based on the 5-celled von Neumann neighborhood.

Table of values

n a(n)
0 1
1 0
2 111
3 0
4 11111
5 0
6 1111111
7 0
8 111111111
9 0
10 11111111111
11 0
12 1111111111111
13 0
14 111111111111111
15 0
16 11111111111111111
17 0
18 1111111111111111111
19 0
20 111111111111111111111
21 0
22 11111111111111111111111
23 0
24 1111111111111111111111111
25 0

List of values

[1, 0, 111, 0, 11111, 0, 1111111, 0, 111111111, 0, 11111111111, 0, 1111111111111, 0, 111111111111111, 0, 11111111111111111, 0, 1111111111111111111, 0, 111111111111111111111, 0, 11111111111111111111111, 0, 1111111111111111111111111, 0]

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

Content is available under The OEIS End-User License Agreement.