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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.

A121380 Sums of primitive roots for n (or 0 if n has no primitive roots).

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 5
6 5
7 8
8 0
9 7
10 10
11 23
12 0
13 26
14 8
15 0
16 0
17 68
18 16
19 57
20 0
21 0
22 56
23 139
24 0
25 100
26 52
27 75
28 0
29 174
30 0
31 123
32 0
33 0
34 136
35 0
36 0
37 222
38 114
39 0
40 0
41 328
42 0
43 257
44 0
45 0
46 208
47 612
48 0
49 300
50 200
51 0
52 0
53 636
54 156
55 0
56 0
57 0
58 348
59 886
60 0
61 488
62 216
63 0
64 0
65 0
66 0
67 669
68 0
69 0
70 0

List of values

[0, 1, 2, 3, 5, 5, 8, 0, 7, 10, 23, 0, 26, 8, 0, 0, 68, 16, 57, 0, 0, 56, 139, 0, 100, 52, 75, 0, 174, 0, 123, 0, 0, 136, 0, 0, 222, 114, 0, 0, 328, 0, 257, 0, 0, 208, 612, 0, 300, 200, 0, 0, 636, 156, 0, 0, 0, 348, 886, 0, 488, 216, 0, 0, 0, 0, 669, 0, 0, 0]

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

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