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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.

A070305 Numbers m such that Card(k>0 : phi(k)=phi(m)) = tau(m).

Table of values

n a(n)
1 2
2 4
3 8
4 10
5 11
6 14
7 16
8 23
9 27
10 28
11 29
12 31
13 32
14 38
15 47
16 53
17 59
18 64
19 67
20 71
21 79
22 83
23 86
24 100
25 103
26 107
27 114
28 125
29 127
30 128
31 131
32 136
33 137
34 139
35 147
36 149
37 151
38 167
39 170
40 172
41 173
42 176
43 179
44 191
45 197
46 199
47 202
48 211
49 223
50 227
51 229
52 235
53 239
54 251
55 256
56 263
57 265
58 269

List of values

[2, 4, 8, 10, 11, 14, 16, 23, 27, 28, 29, 31, 32, 38, 47, 53, 59, 64, 67, 71, 79, 83, 86, 100, 103, 107, 114, 125, 127, 128, 131, 136, 137, 139, 147, 149, 151, 167, 170, 172, 173, 176, 179, 191, 197, 199, 202, 211, 223, 227, 229, 235, 239, 251, 256, 263, 265, 269]