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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.

A216411 Number of bases in which n begins with a "1".

Table of values

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

List of values

[1, 2, 3, 4, 4, 5, 5, 7, 7, 8, 8, 9, 9, 10, 11, 12, 11, 12, 12, 13, 13, 14, 14, 16, 16, 18, 18, 19, 19, 20, 19, 20, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 30, 29, 30, 30, 31, 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 37, 38, 38, 39, 39, 40, 40]

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

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