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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.

A266990 The indices of primes p for which the average of the primitive roots is > p/2.

Table of values

n a(n)
1 2
2 4
3 5
4 9
5 15
6 17
7 20
8 22
9 23
10 27
11 28
12 31
13 32
14 34
15 36
16 38
17 39
18 41
19 43
20 46
21 47
22 49
23 52
24 54
25 56
26 58
27 61
28 64
29 67
30 69
31 72
32 73
33 76
34 81
35 83
36 85
37 86
38 90
39 91
40 92
41 93
42 95
43 96
44 99
45 101
46 103
47 105
48 107
49 109
50 111
51 118
52 120
53 125
54 128
55 129
56 131
57 132
58 133
59 138
60 141
61 143
62 144
63 146
64 150

List of values

[2, 4, 5, 9, 15, 17, 20, 22, 23, 27, 28, 31, 32, 34, 36, 38, 39, 41, 43, 46, 47, 49, 52, 54, 56, 58, 61, 64, 67, 69, 72, 73, 76, 81, 83, 85, 86, 90, 91, 92, 93, 95, 96, 99, 101, 103, 105, 107, 109, 111, 118, 120, 125, 128, 129, 131, 132, 133, 138, 141, 143, 144, 146, 150]

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

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