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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.

A071996 a(1) = 0, a(2) = 1, a(n) = a(floor(n/3)) + a(n - floor(n/3)).

Table of values

n a(n)
1 0
2 1
3 1
4 1
5 1
6 2
7 2
8 3
9 3
10 3
11 4
12 4
13 4
14 4
15 4
16 5
17 5
18 6
19 6
20 6
21 6
22 6
23 7
24 8
25 8
26 9
27 9
28 9
29 9
30 9
31 9
32 9
33 10
34 11
35 12
36 12
37 12
38 13
39 13
40 13
41 13
42 13
43 13
44 13
45 13
46 13
47 13
48 14
49 15
50 16
51 16
52 17
53 17
54 18
55 18
56 19
57 19
58 19
59 19
60 19
61 19
62 19
63 19
64 19
65 19
66 19
67 19
68 19
69 20
70 20
71 21
72 22
73 23
74 24
75 24
76 24
77 25
78 26
79 26
80 27

List of values

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

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