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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.

A332713 a(n) = Sum_{d|n} phi(d/gcd(d, n/d)).

Table of values

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

List of values

[1, 2, 3, 4, 5, 6, 7, 7, 8, 10, 11, 12, 13, 14, 15, 13, 17, 16, 19, 20, 21, 22, 23, 21, 22, 26, 22, 28, 29, 30, 31, 24, 33, 34, 35, 32, 37, 38, 39, 35, 41, 42, 43, 44, 40, 46, 47, 39, 44, 44, 51, 52, 53, 44, 55, 49, 57, 58, 59, 60, 61, 62, 56, 46, 65, 66, 67, 68, 69, 70]

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

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