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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.

A224748 Given n-th prime p, a(n) = number of primes of the form p + q - 1 where q is any prime < p.

Table of values

n a(n)
1 0
2 0
3 1
4 1
5 2
6 3
7 3
8 3
9 2
10 3
11 6
12 6
13 5
14 8
15 4
16 4
17 4
18 11
19 11
20 8
21 9
22 11
23 4
24 5
25 13
26 9
27 11
28 7
29 13
30 5
31 17
32 10
33 9
34 15
35 7
36 19
37 17
38 18
39 10
40 8
41 8
42 25
43 12
44 17
45 12
46 18
47 29
48 23
49 12
50 21
51 12
52 15
53 28
54 18
55 11
56 11
57 12
58 32
59 25
60 19
61 22
62 14
63 29
64 17
65 27
66 14
67 40
68 36
69 18
70 29
71 16
72 13

List of values

[0, 0, 1, 1, 2, 3, 3, 3, 2, 3, 6, 6, 5, 8, 4, 4, 4, 11, 11, 8, 9, 11, 4, 5, 13, 9, 11, 7, 13, 5, 17, 10, 9, 15, 7, 19, 17, 18, 10, 8, 8, 25, 12, 17, 12, 18, 29, 23, 12, 21, 12, 15, 28, 18, 11, 11, 12, 32, 25, 19, 22, 14, 29, 17, 27, 14, 40, 36, 18, 29, 16, 13]

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

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