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.

A033949 Positive integers that do not have a primitive root.

Table of values

n a(n)
1 8
2 12
3 15
4 16
5 20
6 21
7 24
8 28
9 30
10 32
11 33
12 35
13 36
14 39
15 40
16 42
17 44
18 45
19 48
20 51
21 52
22 55
23 56
24 57
25 60
26 63
27 64
28 65
29 66
30 68
31 69
32 70
33 72
34 75
35 76
36 77
37 78
38 80
39 84
40 85
41 87
42 88
43 90
44 91
45 92
46 93
47 95
48 96
49 99
50 100
51 102
52 104
53 105
54 108
55 110
56 111
57 112
58 114
59 115
60 116
61 117
62 119
63 120
64 123

List of values

[8, 12, 15, 16, 20, 21, 24, 28, 30, 32, 33, 35, 36, 39, 40, 42, 44, 45, 48, 51, 52, 55, 56, 57, 60, 63, 64, 65, 66, 68, 69, 70, 72, 75, 76, 77, 78, 80, 84, 85, 87, 88, 90, 91, 92, 93, 95, 96, 99, 100, 102, 104, 105, 108, 110, 111, 112, 114, 115, 116, 117, 119, 120, 123]

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

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