cp's OEIS Frontend

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.

A143834 Numbers k such that 2k^2 - 1 is not prime.

Table of values

n a(n)
1 1
2 5
3 9
4 12
5 14
6 16
7 19
8 20
9 23
10 26
11 27
12 29
13 30
14 31
15 32
16 33
17 35
18 37
19 40
20 44
21 47
22 48
23 51
24 53
25 54
26 55
27 57
28 58
29 60
30 61
31 65
32 66
33 67
34 68
35 70
36 71
37 72
38 74
39 75
40 77
41 78
42 79
43 82
44 83
45 84
46 86
47 88
48 89
49 90
50 93
51 94
52 96
53 97
54 99
55 100
56 101
57 103
58 104
59 105
60 106
61 107
62 110
63 111
64 114
65 116
66 117

List of values

[1, 5, 9, 12, 14, 16, 19, 20, 23, 26, 27, 29, 30, 31, 32, 33, 35, 37, 40, 44, 47, 48, 51, 53, 54, 55, 57, 58, 60, 61, 65, 66, 67, 68, 70, 71, 72, 74, 75, 77, 78, 79, 82, 83, 84, 86, 88, 89, 90, 93, 94, 96, 97, 99, 100, 101, 103, 104, 105, 106, 107, 110, 111, 114, 116, 117]

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

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