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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.

A033112 Number of 9's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 1
10 1
11 1
12 1
13 1
14 1
15 1
16 1
17 1
18 1
19 2
20 3
21 4
22 5
23 6
24 7
25 8
26 9
27 10
28 11
29 13
30 14
31 16
32 17
33 19
34 20
35 22
36 23
37 25
38 26
39 29
40 30
41 32
42 34
43 36
44 37
45 40
46 41
47 43
48 45
49 48
50 49
51 52
52 53
53 56
54 58
55 60
56 61
57 65
58 66
59 69
60 71
61 74
62 75
63 78
64 80
65 83
66 85
67 87
68 88
69 94

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 29, 30, 32, 34, 36, 37, 40, 41, 43, 45, 48, 49, 52, 53, 56, 58, 60, 61, 65, 66, 69, 71, 74, 75, 78, 80, 83, 85, 87, 88, 94]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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