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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.

A138305 Irregular triangle of prime primitive roots of prime(n).

Table of values

n a(n)
2 2
3 2
4 3
5 3
6 5
7 2
8 7
9 2
10 7
11 11
12 3
13 5
14 7
15 11
16 2
17 3
18 13
19 5
20 7
21 11
22 17
23 19
24 2
25 3
26 11
27 19
28 3
29 11
30 13
31 17
32 2
33 5
34 13
35 17
36 19
37 7
38 11
39 13
40 17
41 19
42 29
43 3
44 5
45 19
46 29
47 5
48 11
49 13
50 19
51 23
52 29
53 31
54 41
55 43
56 2
57 3
58 5
59 19
60 31
61 41
62 2
63 11
64 13
65 23
66 31
67 37
68 43
69 47
70 2
71 7
72 17
73 31
74 43
75 59
76 2
77 7
78 11
79 13
80 31
81 41
82 61
83 7

List of values

[2, 2, 3, 3, 5, 2, 7, 2, 7, 11, 3, 5, 7, 11, 2, 3, 13, 5, 7, 11, 17, 19, 2, 3, 11, 19, 3, 11, 13, 17, 2, 5, 13, 17, 19, 7, 11, 13, 17, 19, 29, 3, 5, 19, 29, 5, 11, 13, 19, 23, 29, 31, 41, 43, 2, 3, 5, 19, 31, 41, 2, 11, 13, 23, 31, 37, 43, 47, 2, 7, 17, 31, 43, 59, 2, 7, 11, 13, 31, 41, 61, 7]

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