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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.

A255938 Langton's ant walk: number of black cells on the infinite grid after the ant moves n times.

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 7
10 6
11 7
12 8
13 9
14 10
15 9
16 8
17 7
18 6
19 7
20 6
21 7
22 8
23 9
24 10
25 9
26 10
27 11
28 12
29 13
30 12
31 11
32 10
33 9
34 10
35 9
36 10
37 11
38 12
39 13
40 12
41 13
42 14
43 15
44 16
45 15
46 14
47 13
48 12
49 13
50 12
51 11
52 12
53 13
54 12
55 13
56 14
57 15
58 16
59 15
60 14
61 13
62 12
63 13
64 12
65 13
66 14
67 15
68 16
69 15
70 16
71 17

List of values

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

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

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