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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.

A283240 Triangle read by rows: T(n,k) = number of directed self-avoiding walks (SAWs) of length k in an n-ladder graph that use all rows of the graph.

Table of values

n a(n)
1 2
2 2
3 0
4 4
5 8
6 8
7 0
8 0
9 4
10 12
11 20
12 16
13 0
14 0
15 0
16 4
17 16
18 32
19 40
20 28
21 0
22 0
23 0
24 0
25 4
26 20
27 48
28 72
29 72
30 44
31 0
32 0
33 0
34 0
35 0
36 4
37 24
38 68
39 120
40 144
41 120
42 64
43 0
44 0
45 0
46 0
47 0
48 0
49 4
50 28
51 92
52 188
53 264
54 264
55 188
56 88
57 0
58 0
59 0
60 0
61 0
62 0
63 0
64 4
65 32
66 120
67 280
68 452
69 528
70 452
71 280
72 116

List of values

[2, 2, 0, 4, 8, 8, 0, 0, 4, 12, 20, 16, 0, 0, 0, 4, 16, 32, 40, 28, 0, 0, 0, 0, 4, 20, 48, 72, 72, 44, 0, 0, 0, 0, 0, 4, 24, 68, 120, 144, 120, 64, 0, 0, 0, 0, 0, 0, 4, 28, 92, 188, 264, 264, 188, 88, 0, 0, 0, 0, 0, 0, 0, 4, 32, 120, 280, 452, 528, 452, 280, 116]

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