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.

A269711 Number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 20", based on the 5-celled von Neumann neighborhood.

Table of values

n a(n)
0 1
1 4
2 8
3 12
4 20
5 24
6 44
7 28
8 52
9 56
10 104
11 56
12 104
13 112
14 212
15 60
16 116
17 120
18 232
19 120
20 232
21 240
22 464
23 120
24 232
25 240
26 464
27 240
28 464
29 480
30 932
31 124
32 244
33 248
34 488
35 248
36 488
37 496
38 976
39 248
40 488
41 496
42 976
43 496
44 976
45 992
46 1952
47 248
48 488
49 496
50 976
51 496
52 976
53 992

List of values

[1, 4, 8, 12, 20, 24, 44, 28, 52, 56, 104, 56, 104, 112, 212, 60, 116, 120, 232, 120, 232, 240, 464, 120, 232, 240, 464, 240, 464, 480, 932, 124, 244, 248, 488, 248, 488, 496, 976, 248, 488, 496, 976, 496, 976, 992, 1952, 248, 488, 496, 976, 496, 976, 992]