cp's OEIS Frontend

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.

A115566 Numbers k such that 2^k, 2^(k+1) and 2^(k+2) have the same number of digits.

Table of values

n a(n)
1 1
2 4
3 7
4 10
5 11
6 14
7 17
8 20
9 21
10 24
11 27
12 30
13 31
14 34
15 37
16 40
17 41
18 44
19 47
20 50
21 51
22 54
23 57
24 60
25 61
26 64
27 67
28 70
29 71
30 74
31 77
32 80
33 81
34 84
35 87
36 90
37 91
38 94
39 97
40 100
41 103
42 104
43 107
44 110
45 113
46 114
47 117
48 120
49 123
50 124
51 127
52 130
53 133
54 134
55 137
56 140
57 143
58 144
59 147
60 150
61 153
62 154

List of values

[1, 4, 7, 10, 11, 14, 17, 20, 21, 24, 27, 30, 31, 34, 37, 40, 41, 44, 47, 50, 51, 54, 57, 60, 61, 64, 67, 70, 71, 74, 77, 80, 81, 84, 87, 90, 91, 94, 97, 100, 103, 104, 107, 110, 113, 114, 117, 120, 123, 124, 127, 130, 133, 134, 137, 140, 143, 144, 147, 150, 153, 154]

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

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