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.

A224490 Smallest k such that k*2*p(n)^2-1=q is prime and k*2*q^2-1 is also prime.

Table of values

n a(n)
1 1
2 1
3 25
4 9
5 21
6 3
7 1
8 16
9 25
10 136
11 10
12 33
13 90
14 250
15 10
16 55
17 1
18 9
19 36
20 75
21 1
22 4
23 33
24 406
25 103
26 15
27 121
28 4
29 244
30 78
31 28
32 19
33 49
34 105
35 45
36 34
37 10
38 46
39 33
40 4
41 111
42 15
43 9
44 36
45 118
46 66
47 10
48 13
49 31
50 76
51 66
52 36
53 55
54 15
55 4
56 48
57 6
58 66
59 13
60 34
61 54
62 64
63 153
64 1
65 60
66 48

List of values

[1, 1, 25, 9, 21, 3, 1, 16, 25, 136, 10, 33, 90, 250, 10, 55, 1, 9, 36, 75, 1, 4, 33, 406, 103, 15, 121, 4, 244, 78, 28, 19, 49, 105, 45, 34, 10, 46, 33, 4, 111, 15, 9, 36, 118, 66, 10, 13, 31, 76, 66, 36, 55, 15, 4, 48, 6, 66, 13, 34, 54, 64, 153, 1, 60, 48]

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

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