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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.

A216138 a(n) = conjectured number of integers k such that n^k has no three consecutive identical digits.

Table of values

n a(n)
2 335
3 246
4 164
5 150
6 141
7 137
8 109
9 120
10 2
11 93
12 79
13 105
14 105
15 98
16 85
17 82
18 76
19 89
20 2
21 79
22 79
23 80
24 72
25 74
26 71
27 85
28 79
29 83
30 2
31 78
32 62
33 70
34 76
35 78
36 75
37 75
38 67
39 68
40 2
41 70
42 70
43 70
44 67
45 61
46 65
47 60
48 60
49 71
50 2
51 77
52 74
53 67
54 63
55 69
56 69
57 58
58 62
59 57
60 2
61 68
62 60
63 67
64 47
65 62

List of values

[335, 246, 164, 150, 141, 137, 109, 120, 2, 93, 79, 105, 105, 98, 85, 82, 76, 89, 2, 79, 79, 80, 72, 74, 71, 85, 79, 83, 2, 78, 62, 70, 76, 78, 75, 75, 67, 68, 2, 70, 70, 70, 67, 61, 65, 60, 60, 71, 2, 77, 74, 67, 63, 69, 69, 58, 62, 57, 2, 68, 60, 67, 47, 62]

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

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