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.

A309075 Total number of black cells after n iterations of Langton's ant with two ants on the grid placed side-by-side on neighboring squares and initially looking in the same direction.

Table of values

n a(n)
0 0
1 2
2 2
3 4
4 6
5 6
6 8
7 8
8 8
9 6
10 6
11 4
12 2
13 2
14 0
15 2
16 2
17 4
18 6
19 6
20 8
21 8
22 8
23 6
24 6
25 4
26 2
27 2
28 0
29 2
30 2
31 4
32 6
33 6
34 8
35 8
36 8
37 6
38 6
39 4
40 2
41 2
42 0
43 2
44 2
45 4
46 6
47 6
48 8
49 8
50 8
51 6
52 6
53 4
54 2
55 2
56 0
57 2
58 2
59 4
60 6
61 6
62 8
63 8
64 8
65 6
66 6
67 4
68 2
69 2
70 0
71 2
72 2
73 4
74 6
75 6
76 8
77 8
78 8
79 6
80 6
81 4
82 2
83 2
84 0
85 2
86 2

List of values

[0, 2, 2, 4, 6, 6, 8, 8, 8, 6, 6, 4, 2, 2, 0, 2, 2, 4, 6, 6, 8, 8, 8, 6, 6, 4, 2, 2, 0, 2, 2, 4, 6, 6, 8, 8, 8, 6, 6, 4, 2, 2, 0, 2, 2, 4, 6, 6, 8, 8, 8, 6, 6, 4, 2, 2, 0, 2, 2, 4, 6, 6, 8, 8, 8, 6, 6, 4, 2, 2, 0, 2, 2, 4, 6, 6, 8, 8, 8, 6, 6, 4, 2, 2, 0, 2, 2]