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.

A277560 Binary representation of the x-axis, from the left edge to the origin, or from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 7", based on the 5-celled von Neumann neighborhood.

Table of values

n a(n)
0 1
1 11
2 0
3 1111
4 0
5 111111
6 0
7 11111111
8 0
9 1111111111
10 0
11 111111111111
12 0
13 11111111111111
14 0
15 1111111111111111
16 0
17 111111111111111111
18 0
19 11111111111111111111
20 0
21 1111111111111111111111
22 0
23 111111111111111111111111
24 0
25 11111111111111111111111111
26 0

List of values

[1, 11, 0, 1111, 0, 111111, 0, 11111111, 0, 1111111111, 0, 111111111111, 0, 11111111111111, 0, 1111111111111111, 0, 111111111111111111, 0, 11111111111111111111, 0, 1111111111111111111111, 0, 111111111111111111111111, 0, 11111111111111111111111111, 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.