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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.

A231772 Smallest positive number which has exactly n primitive roots, or 0 if no such number exists.

Table of values

n a(n)
0 8
1 1
2 5
3 0
4 11
5 0
6 19
7 0
8 17
9 0
10 23
11 0
12 29
13 0
14 0
15 0
16 41
17 0
18 81
19 0
20 67
21 0
22 47
23 0
24 53
25 0
26 0
27 0
28 59
29 0
30 0
31 0
32 97
33 0
34 0
35 0
36 109
37 0
38 0
39 0
40 83
41 0
42 0
43 0
44 139
45 0
46 0
47 0
48 113
49 0
50 0
51 0
52 107
53 0
54 163
55 0
56 0
57 0
58 0
59 0
60 199
61 0
62 0
63 0
64 137
65 0
66 0
67 0
68 0
69 0
70 0
71 0
72 149
73 0
74 0
75 0
76 0
77 0

List of values

[8, 1, 5, 0, 11, 0, 19, 0, 17, 0, 23, 0, 29, 0, 0, 0, 41, 0, 81, 0, 67, 0, 47, 0, 53, 0, 0, 0, 59, 0, 0, 0, 97, 0, 0, 0, 109, 0, 0, 0, 83, 0, 0, 0, 139, 0, 0, 0, 113, 0, 0, 0, 107, 0, 163, 0, 0, 0, 0, 0, 199, 0, 0, 0, 137, 0, 0, 0, 0, 0, 0, 0, 149, 0, 0, 0, 0, 0]

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

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