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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.

A334487 a(n) = p(n, 2)*p(n, 5)/p(n, 10) where p(n, b) is the period of repeating digits of 1/n in base b.

Table of values

n a(n)
1 1
2 1
3 4
4 1
5 4
6 4
7 3
8 2
9 36
10 4
11 25
12 4
13 8
14 3
15 8
16 4
17 8
18 36
19 9
20 4
21 6
22 25
23 11
24 4
25 20
26 8
27 108
28 3
29 14
30 8
31 1
32 8
33 50
34 8
35 12
36 36
37 432
38 9
39 8
40 8
41 80
42 6
43 28
44 25
45 72
46 11
47 23
48 8
49 21
50 20
51 8
52 8
53 208
54 108
55 50
56 3
57 18
58 14
59 29
60 8
61 30
62 1
63 6
64 16
65 8
66 50
67 44
68 8
69 22
70 12
71 5
72 36
73 81
74 432
75 40

List of values

[1, 1, 4, 1, 4, 4, 3, 2, 36, 4, 25, 4, 8, 3, 8, 4, 8, 36, 9, 4, 6, 25, 11, 4, 20, 8, 108, 3, 14, 8, 1, 8, 50, 8, 12, 36, 432, 9, 8, 8, 80, 6, 28, 25, 72, 11, 23, 8, 21, 20, 8, 8, 208, 108, 50, 3, 18, 14, 29, 8, 30, 1, 6, 16, 8, 50, 44, 8, 22, 12, 5, 36, 81, 432, 40]

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

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