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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.

A093390 a(n) = floor(n/9) + floor((n+1)/9) + floor((n+2)/9).

Table of values

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

List of values

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

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