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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.

A320297 a(n) = a(n-1-a(a(a(n-1)))) + a(a(a(a(n-1)))) for n > 1, a(n) = n for n < 2.

Table of values

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

List of values

[0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 10, 10, 10, 11, 12, 12, 12, 13, 14, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 18, 19, 19, 20, 20, 20, 21, 22, 22, 23, 23, 23, 24, 25, 25, 26, 26, 26, 26, 27, 28, 28, 29, 29, 29, 29, 30, 31, 31, 32, 32, 32, 32, 33]

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