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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.

A262978 Exponents n such that 2^n-1 and 2^n+1 are squarefree.

Table of values

n a(n)
1 1
2 2
3 4
4 5
5 7
6 8
7 11
8 13
9 14
10 16
11 17
12 19
13 22
14 23
15 25
16 26
17 28
18 29
19 31
20 32
21 34
22 35
23 37
24 38
25 41
26 43
27 44
28 46
29 47
30 49
31 52
32 53
33 56
34 58
35 59
36 61
37 62
38 64
39 65
40 67
41 71
42 73
43 74
44 76
45 77
46 79
47 82
48 83
49 85
50 86
51 88
52 89
53 91
54 92
55 94
56 95
57 97
58 98
59 101
60 103
61 104
62 106
63 107
64 109
65 112
66 113
67 115
68 116
69 118
70 119

List of values

[1, 2, 4, 5, 7, 8, 11, 13, 14, 16, 17, 19, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 41, 43, 44, 46, 47, 49, 52, 53, 56, 58, 59, 61, 62, 64, 65, 67, 71, 73, 74, 76, 77, 79, 82, 83, 85, 86, 88, 89, 91, 92, 94, 95, 97, 98, 101, 103, 104, 106, 107, 109, 112, 113, 115, 116, 118, 119]

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

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