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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.

A074987 a(n) is the least m not equal to n such that phi(m) = phi(n).

Table of values

n a(n)
1 2
2 1
3 4
4 3
5 8
6 3
7 9
8 5
9 7
10 5
11 22
12 5
13 21
14 7
15 16
16 15
17 32
18 7
19 27
20 15
21 13
22 11
23 46
24 15
25 33
26 13
27 19
28 13
29 58
30 15
31 62
32 17
33 25
34 17
35 39
36 13
37 57
38 19
39 35
40 17
41 55
42 13
43 49
44 25
45 35
46 23
47 94
48 17
49 43
50 25
51 64
52 35
53 106
54 19
55 41
56 35
57 37
58 29
59 118
60 17
61 77
62 31
63 37
64 51
65 104
66 25
67 134
68 51
69 92
70 35
71 142

List of values

[2, 1, 4, 3, 8, 3, 9, 5, 7, 5, 22, 5, 21, 7, 16, 15, 32, 7, 27, 15, 13, 11, 46, 15, 33, 13, 19, 13, 58, 15, 62, 17, 25, 17, 39, 13, 57, 19, 35, 17, 55, 13, 49, 25, 35, 23, 94, 17, 43, 25, 64, 35, 106, 19, 41, 35, 37, 29, 118, 17, 77, 31, 37, 51, 104, 25, 134, 51, 92, 35, 142]

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

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