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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.

A087816 a(n) = a(a(n-1)) + a(n - 1 - a(n-1)) with a(1) = a(2) = 1.

Table of values

n a(n)
1 1
2 1
3 2
4 2
5 2
6 3
7 4
8 4
9 4
10 4
11 5
12 5
13 6
14 7
15 8
16 8
17 8
18 8
19 8
20 9
21 9
22 9
23 10
24 10
25 11
26 12
27 12
28 13
29 14
30 15
31 16
32 16
33 16
34 16
35 16
36 16
37 17
38 17
39 17
40 17
41 18
42 18
43 18
44 19
45 19
46 20
47 21
48 21
49 21
50 22
51 22
52 23
53 24
54 24
55 25
56 26
57 27
58 27
59 28
60 29
61 30
62 31
63 32
64 32
65 32
66 32
67 32
68 32
69 32
70 33
71 33
72 33
73 33
74 33
75 34
76 34
77 34

List of values

[1, 1, 2, 2, 2, 3, 4, 4, 4, 4, 5, 5, 6, 7, 8, 8, 8, 8, 8, 9, 9, 9, 10, 10, 11, 12, 12, 13, 14, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 20, 21, 21, 21, 22, 22, 23, 24, 24, 25, 26, 27, 27, 28, 29, 30, 31, 32, 32, 32, 32, 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, 34]

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