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.

A138291 Number of primes of the form prime(n)+g, where g is a primitive root of prime(n).

Table of values

n a(n)
1 1
2 1
3 1
4 0
5 3
6 1
7 3
8 1
9 2
10 4
11 2
12 2
13 4
14 3
15 2
16 7
17 10
18 3
19 3
20 3
21 4
22 6
23 10
24 7
25 6
26 11
27 7
28 12
29 7
30 9
31 6
32 10
33 14
34 10
35 17
36 10
37 10
38 12
39 11
40 13
41 22
42 7
43 9
44 11
45 16
46 10
47 5
48 13
49 23
50 8
51 23
52 12
53 9
54 23
55 26
56 22
57 25
58 13
59 12
60 14
61 13
62 19
63 12
64 18
65 14
66 32
67 17
68 18
69 30
70 22
71 32
72 21
73 20
74 14
75 17
76 28
77 30
78 19
79 19
80 21

List of values

[1, 1, 1, 0, 3, 1, 3, 1, 2, 4, 2, 2, 4, 3, 2, 7, 10, 3, 3, 3, 4, 6, 10, 7, 6, 11, 7, 12, 7, 9, 6, 10, 14, 10, 17, 10, 10, 12, 11, 13, 22, 7, 9, 11, 16, 10, 5, 13, 23, 8, 23, 12, 9, 23, 26, 22, 25, 13, 12, 14, 13, 19, 12, 18, 14, 32, 17, 18, 30, 22, 32, 21, 20, 14, 17, 28, 30, 19, 19, 21]

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

Content is available under The OEIS End-User License Agreement.