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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.

A262994 Smallest number k>2 such that k*2^n-1 is a prime number.

Table of values

n a(n)
1 3
2 3
3 3
4 3
5 4
6 3
7 3
8 5
9 7
10 5
11 3
12 5
13 9
14 5
15 4
16 8
17 4
18 3
19 28
20 14
21 7
22 26
23 13
24 39
25 22
26 11
27 16
28 8
29 4
30 20
31 10
32 5
33 6
34 3
35 24
36 12
37 6
38 3
39 25
40 24
41 12
42 6
43 3
44 14
45 7
46 20
47 10
48 5
49 19
50 11
51 21
52 20
53 10
54 5
55 3
56 32
57 16
58 8
59 4
60 17
61 24
62 12
63 6
64 3
65 67
66 63
67 43
68 63
69 40
70 20
71 10
72 5
73 15
74 12
75 6
76 3

List of values

[3, 3, 3, 3, 4, 3, 3, 5, 7, 5, 3, 5, 9, 5, 4, 8, 4, 3, 28, 14, 7, 26, 13, 39, 22, 11, 16, 8, 4, 20, 10, 5, 6, 3, 24, 12, 6, 3, 25, 24, 12, 6, 3, 14, 7, 20, 10, 5, 19, 11, 21, 20, 10, 5, 3, 32, 16, 8, 4, 17, 24, 12, 6, 3, 67, 63, 43, 63, 40, 20, 10, 5, 15, 12, 6, 3]

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