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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.

A308937 Langton's ant on a chair tiling: number of black cells after n moves of the ant.

Table of values

n a(n)
0 0
1 1
2 2
3 3
4 4
5 3
6 4
7 5
8 6
9 5
10 4
11 5
12 6
13 7
14 8
15 7
16 8
17 9
18 10
19 9
20 10
21 9
22 10
23 11
24 12
25 11
26 10
27 9
28 10
29 9
30 10
31 11
32 12
33 13
34 12
35 13
36 14
37 15
38 14
39 15
40 14
41 15
42 16
43 17
44 16
45 15
46 14
47 15
48 14
49 15
50 16
51 17
52 18
53 17
54 18
55 19
56 20
57 21
58 20
59 19
60 20
61 19
62 20
63 19
64 18
65 17
66 18
67 19
68 20
69 21
70 20

List of values

[0, 1, 2, 3, 4, 3, 4, 5, 6, 5, 4, 5, 6, 7, 8, 7, 8, 9, 10, 9, 10, 9, 10, 11, 12, 11, 10, 9, 10, 9, 10, 11, 12, 13, 12, 13, 14, 15, 14, 15, 14, 15, 16, 17, 16, 15, 14, 15, 14, 15, 16, 17, 18, 17, 18, 19, 20, 21, 20, 19, 20, 19, 20, 19, 18, 17, 18, 19, 20, 21, 20]

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

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