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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.

A305942 Number of powers of 2 having exactly n digits '0' (in base 10), conjectured.

Table of values

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

List of values

[36, 41, 31, 34, 25, 32, 37, 23, 43, 47, 33, 35, 29, 27, 27, 39, 34, 34, 28, 29, 31, 30, 38, 25, 35, 35, 36, 40, 32, 40, 43, 39, 32, 30, 30, 32, 36, 39, 23, 26, 31, 37, 27, 28, 33, 39, 28, 44, 34, 27, 43, 33, 27, 32, 31, 27, 27, 32, 35, 34, 36, 28, 32, 39, 38, 40, 28, 43, 38, 32, 22]

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

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