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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.

A045762 Numbers k such that 2^k - 1 is not a prime.

Table of values

n a(n)
1 0
2 1
3 4
4 6
5 8
6 9
7 10
8 11
9 12
10 14
11 15
12 16
13 18
14 20
15 21
16 22
17 23
18 24
19 25
20 26
21 27
22 28
23 29
24 30
25 32
26 33
27 34
28 35
29 36
30 37
31 38
32 39
33 40
34 41
35 42
36 43
37 44
38 45
39 46
40 47
41 48
42 49
43 50
44 51
45 52
46 53
47 54
48 55
49 56
50 57
51 58
52 59
53 60
54 62
55 63
56 64
57 65
58 66
59 67
60 68
61 69
62 70
63 71
64 72
65 73
66 74
67 75
68 76
69 77
70 78
71 79

List of values

[0, 1, 4, 6, 8, 9, 10, 11, 12, 14, 15, 16, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 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, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79]

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

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