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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.

A224979 Number of primes of the form p-q+1 where q is any prime < p = prime(n).

Table of values

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

List of values

[0, 1, 1, 2, 2, 3, 4, 4, 6, 6, 4, 3, 8, 6, 10, 10, 12, 5, 4, 12, 9, 8, 16, 18, 6, 16, 10, 16, 12, 20, 6, 18, 16, 14, 24, 8, 9, 10, 26, 22, 28, 12, 22, 13, 26, 16, 12, 14, 24, 18, 30, 36, 16, 32, 28, 32, 38, 14, 13, 32, 16, 38, 16, 34, 17, 30, 12, 18, 32, 26]

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

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