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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.

A081608 Number of numbers <= n having no 0 in their ternary representation.

Table of values

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

List of values

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

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