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.

A173416 Exactly one of 2n^2-1 and 2n^2+1 is prime.

Table of values

n a(n)
1 1
2 2
3 4
4 7
5 8
6 9
7 10
8 11
9 13
10 15
11 17
12 18
13 22
14 25
15 27
16 28
17 30
18 33
19 34
20 38
21 39
22 41
23 43
24 46
25 49
26 50
27 52
28 56
29 59
30 62
31 63
32 64
33 66
34 69
35 72
36 73
37 75
38 76
39 80
40 81
41 85
42 91
43 92
44 93
45 95
46 96
47 98
48 99
49 105
50 108
51 109
52 112
53 113
54 115
55 118
56 123
57 125
58 126
59 127
60 134
61 135
62 137
63 140
64 141
65 143

List of values

[1, 2, 4, 7, 8, 9, 10, 11, 13, 15, 17, 18, 22, 25, 27, 28, 30, 33, 34, 38, 39, 41, 43, 46, 49, 50, 52, 56, 59, 62, 63, 64, 66, 69, 72, 73, 75, 76, 80, 81, 85, 91, 92, 93, 95, 96, 98, 99, 105, 108, 109, 112, 113, 115, 118, 123, 125, 126, 127, 134, 135, 137, 140, 141, 143]

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

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