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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.

A067843 Least solution k>n of phi(k-n)+phi(k+n)=phi(2k).

Table of values

n a(n)
1 5
2 10
3 7
4 10
5 11
6 12
7 35
8 14
9 13
10 22
11 55
12 22
13 19
14 70
15 19
16 22
17 85
18 26
19 77
20 26
21 27
22 110
23 55
24 34
25 55
26 38
27 31
28 34
29 119
30 38
31 65
32 44
33 41
34 52
35 65
36 46
37 185
38 154
39 43
40 46
41 143
42 54
43 215
44 70
45 57
46 110
47 161
48 58
49 187
50 68
51 67
52 76
53 203
54 62
55 175
56 62
57 61
58 76
59 95
60 74
61 67
62 130
63 71
64 88
65 95
66 82
67 115
68 74
69 73
70 130
71 215

List of values

[5, 10, 7, 10, 11, 12, 35, 14, 13, 22, 55, 22, 19, 70, 19, 22, 85, 26, 77, 26, 27, 110, 55, 34, 55, 38, 31, 34, 119, 38, 65, 44, 41, 52, 65, 46, 185, 154, 43, 46, 143, 54, 215, 70, 57, 110, 161, 58, 187, 68, 67, 76, 203, 62, 175, 62, 61, 76, 95, 74, 67, 130, 71, 88, 95, 82, 115, 74, 73, 130, 215]