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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.

A064657 a(n) = a(|n - a(n-3)|) + a(|n - a(n-4)|) for n > 3, a(n)=1 otherwise.

Table of values

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

List of values

[1, 1, 1, 1, 2, 4, 8, 12, 10, 5, 2, 2, 13, 12, 26, 13, 3, 9, 14, 11, 11, 25, 12, 26, 13, 13, 27, 27, 26, 4, 2, 6, 34, 10, 60, 5, 28, 53, 22, 62, 25, 24, 22, 25, 22, 51, 38, 25, 28, 3, 26, 53, 16, 53, 27, 63, 26, 4, 10, 12, 86, 57, 42, 79, 24, 36, 25, 38, 56, 32, 85, 23]

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