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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.

A209389 Product of positive odd integers smaller than n and relatively prime to n, taken Modd n. A209388(n) (Modd n).

Table of values

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

List of values

[0, 1, 1, 3, 3, 5, 1, 7, 1, 9, 1, 1, 5, 13, 11, 15, 13, 17, 1, 1, 13, 21, 1, 1, 7, 25, 1, 1, 17, 1, 1, 31, 23, 33, 29, 1, 31, 37, 25, 1, 9, 1, 1, 1, 19, 45, 1, 1, 1, 49, 35, 1, 23, 53, 21, 1, 37, 57, 1, 1, 11, 61, 55, 63, 1, 1, 1, 1, 47, 1]

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

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