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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.

A093878 a(1)=a(2)=1; for n >=3, a(n) = a(a(a(n-1))) + a(n-a(a(n-1))).

Table of values

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

List of values

[1, 1, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 8, 9, 10, 11, 12, 12, 12, 13, 13, 14, 15, 16, 16, 17, 18, 19, 20, 20, 20, 20, 21, 21, 22, 23, 24, 25, 26, 27, 27, 28, 28, 28, 29, 30, 31, 32, 33, 33, 33, 33, 33, 34, 34, 35, 36, 37, 38, 38, 39, 40, 41, 42, 43, 44, 45, 46, 46, 47, 47, 47, 48, 48]

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