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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.

A171727 The number of twin prime pairs in the interval (p^2,p*q), where (p,q) runs over the twin prime pairs (A001359(n),A006512(n)).

Table of values

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

List of values

[1, 1, 1, 1, 2, 2, 4, 1, 3, 2, 2, 4, 7, 3, 3, 5, 7, 4, 4, 7, 6, 11, 9, 5, 11, 9, 9, 11, 10, 11, 9, 11, 11, 12, 11, 12, 18, 12, 12, 16, 11, 16, 20, 14, 16, 15, 20, 16, 22, 13, 22, 16, 17, 21, 20, 20, 23, 22, 23, 20, 21, 21, 26, 20, 28, 24, 24, 23, 24, 25, 21, 24, 37, 27, 21, 28, 24, 31]

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

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