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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.

A309241 Langton's ant on a rhombitrihexagonal 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 3
6 4
7 5
8 6
9 7
10 8
11 9
12 8
13 9
14 10
15 11
16 12
17 11
18 12
19 13
20 14
21 15
22 16
23 15
24 14
25 13
26 12
27 11
28 10
29 11
30 10
31 9
32 8
33 7
34 8
35 9
36 10
37 11
38 12
39 13
40 12
41 13
42 14
43 13
44 12
45 13
46 14
47 15
48 16
49 15
50 14
51 15
52 14
53 13
54 14
55 15
56 14
57 15
58 16
59 17
60 18
61 17
62 18
63 19
64 20
65 21
66 22
67 21
68 20
69 21

List of values

[0, 1, 2, 3, 4, 3, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 11, 12, 13, 14, 15, 16, 15, 14, 13, 12, 11, 10, 11, 10, 9, 8, 7, 8, 9, 10, 11, 12, 13, 12, 13, 14, 13, 12, 13, 14, 15, 16, 15, 14, 15, 14, 13, 14, 15, 14, 15, 16, 17, 18, 17, 18, 19, 20, 21, 22, 21, 20, 21]

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

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