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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.

A151906 a(0) = 0, a(1) = 1; for n>1, a(n) = 8*A151905(n) + 4.

Table of values

n a(n)
0 0
1 1
2 4
3 4
4 4
5 12
6 4
7 4
8 12
9 12
10 12
11 36
12 4
13 4
14 12
15 12
16 12
17 36
18 12
19 12
20 36
21 36
22 36
23 108
24 4
25 4
26 12
27 12
28 12
29 36
30 12
31 12
32 36
33 36
34 36
35 108
36 12
37 12
38 36
39 36
40 36
41 108
42 36
43 36
44 108
45 108
46 108
47 324
48 4
49 4
50 12
51 12
52 12
53 36
54 12
55 12
56 36
57 36
58 36
59 108
60 12
61 12
62 36
63 36
64 36
65 108
66 36
67 36
68 108
69 108
70 108

List of values

[0, 1, 4, 4, 4, 12, 4, 4, 12, 12, 12, 36, 4, 4, 12, 12, 12, 36, 12, 12, 36, 36, 36, 108, 4, 4, 12, 12, 12, 36, 12, 12, 36, 36, 36, 108, 12, 12, 36, 36, 36, 108, 36, 36, 108, 108, 108, 324, 4, 4, 12, 12, 12, 36, 12, 12, 36, 36, 36, 108, 12, 12, 36, 36, 36, 108, 36, 36, 108, 108, 108]

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