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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.

A309293 Langton's ant on a snub trihexagonal tiling: number of black cells after n moves of the ant when starting on a hexagon.

Table of values

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

List of values

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

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

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