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.

A219027 Number of non-primitive roots for n, less than n.

Table of values

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

List of values

[0, 0, 1, 2, 2, 4, 4, 7, 6, 7, 6, 11, 8, 11, 14, 15, 8, 15, 12, 19, 20, 17, 12, 23, 16, 21, 20, 27, 16, 29, 22, 31, 32, 25, 34, 35, 24, 31, 38, 39, 24, 41, 30, 43, 44, 35, 24, 47, 36, 41, 50, 51, 28, 47, 54, 55, 56, 45, 30, 59, 44, 53, 62, 63, 64, 65, 46, 67, 68]

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

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