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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.

A239677 Least numbers k such that k*3^n-1 is prime.

Table of values

n a(n)
1 1
2 2
3 2
4 8
5 4
6 6
7 2
8 2
9 16
10 8
11 6
12 2
13 16
14 10
15 4
16 14
17 8
18 18
19 6
20 2
21 18
22 6
23 2
24 20
25 18
26 6
27 2
28 38
29 30
30 10
31 16
32 20
33 18
34 6
35 2
36 60
37 20
38 10
39 10
40 40
41 58
42 48
43 16
44 12
45 4
46 32
47 90
48 30
49 10
50 8
51 130
52 62
53 26
54 10
55 6
56 2
57 30
58 10
59 32
60 18
61 6
62 2
63 74
64 28
65 46
66 18
67 6
68 2
69 30
70 10
71 46
72 80
73 94
74 52

List of values

[1, 2, 2, 8, 4, 6, 2, 2, 16, 8, 6, 2, 16, 10, 4, 14, 8, 18, 6, 2, 18, 6, 2, 20, 18, 6, 2, 38, 30, 10, 16, 20, 18, 6, 2, 60, 20, 10, 10, 40, 58, 48, 16, 12, 4, 32, 90, 30, 10, 8, 130, 62, 26, 10, 6, 2, 30, 10, 32, 18, 6, 2, 74, 28, 46, 18, 6, 2, 30, 10, 46, 80, 94, 52]

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