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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.

A053451 Multiplicative order of 8 mod 2n+1.

Table of values

n a(n)
0 1
1 2
2 4
3 1
4 2
5 10
6 4
7 4
8 8
9 6
10 2
11 11
12 20
13 6
14 28
15 5
16 10
17 4
18 12
19 4
20 20
21 14
22 4
23 23
24 7
25 8
26 52
27 20
28 6
29 58
30 20
31 2
32 4
33 22
34 22
35 35
36 3
37 20
38 10
39 13
40 18
41 82
42 8
43 28
44 11
45 4
46 10
47 12
48 16
49 10
50 100
51 17
52 4
53 106
54 12
55 12
56 28
57 44
58 4
59 8
60 110
61 20
62 100
63 7
64 14
65 130
66 6
67 12
68 68
69 46
70 46
71 20
72 28
73 14
74 148
75 5

List of values

[1, 2, 4, 1, 2, 10, 4, 4, 8, 6, 2, 11, 20, 6, 28, 5, 10, 4, 12, 4, 20, 14, 4, 23, 7, 8, 52, 20, 6, 58, 20, 2, 4, 22, 22, 35, 3, 20, 10, 13, 18, 82, 8, 28, 11, 4, 10, 12, 16, 10, 100, 17, 4, 106, 12, 12, 28, 44, 4, 8, 110, 20, 100, 7, 14, 130, 6, 12, 68, 46, 46, 20, 28, 14, 148, 5]

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