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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.

A140507 Numbers k such that 3^k-1 contains a divisor which is an overpseudoprime in base 3.

Table of values

n a(n)
1 5
2 10
3 11
4 15
5 16
6 17
7 18
8 19
9 20
10 22
11 23
12 25
13 27
14 28
15 29
16 30
17 31
18 32
19 33
20 34
21 35
22 36
23 37
24 38
25 39
26 40
27 41
28 42
29 43
30 44
31 45
32 46
33 47
34 48
35 49
36 50
37 51
38 52
39 53
40 54
41 55
42 56
43 57
44 58
45 59
46 60
47 61
48 62
49 64
50 65
51 66
52 67
53 68
54 69
55 70
56 72
57 73
58 74
59 75
60 76
61 77
62 78
63 79
64 80
65 81
66 82
67 83
68 84
69 85

List of values

[5, 10, 11, 15, 16, 17, 18, 19, 20, 22, 23, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85]

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

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