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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.

A213431 Irregular array T(n,k) of the numbers of distinct shapes under rotation of the non-extendable (complete) non-self-adjacent simple paths of each length within a square lattice bounded by rectangles with nodal dimensions n and 2, n >= 2.

Table of values

n a(n)
2 2
3 2
4 4
5 2
6 2
7 4
8 6
9 6
10 2
11 4
12 6
13 10
14 10
15 2
16 2
17 4
18 6
19 10
20 14
21 16
22 8
23 2
24 4
25 6
26 10
27 14
28 20
29 26
30 18
31 2
32 2
33 4
34 6
35 10
36 14
37 20
38 30
39 40
40 34
41 10
42 2
43 4
44 6
45 10
46 14
47 20
48 30
49 44
50 60
51 60
52 28
53 2
54 2
55 4
56 6
57 10
58 14
59 20
60 30
61 44
62 64
63 90
64 100
65 62
66 12

List of values

[2, 2, 4, 2, 2, 4, 6, 6, 2, 4, 6, 10, 10, 2, 2, 4, 6, 10, 14, 16, 8, 2, 4, 6, 10, 14, 20, 26, 18, 2, 2, 4, 6, 10, 14, 20, 30, 40, 34, 10, 2, 4, 6, 10, 14, 20, 30, 44, 60, 60, 28, 2, 2, 4, 6, 10, 14, 20, 30, 44, 64, 90, 100, 62, 12]

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