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.

A334070 Number of even-order elements in the multiplicative group of integers modulo n.

Table of values

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

List of values

[0, 0, 1, 1, 3, 1, 3, 3, 3, 3, 5, 3, 9, 3, 7, 7, 15, 3, 9, 7, 9, 5, 11, 7, 15, 9, 9, 9, 21, 7, 15, 15, 15, 15, 21, 9, 27, 9, 21, 15, 35, 9, 21, 15, 21, 11, 23, 15, 21, 15, 31, 21, 39, 9, 35, 21, 27, 21, 29, 15, 45, 15, 27, 31, 45, 15, 33, 31, 33, 21, 35, 21, 63]

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

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