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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.

A053577 Cototient function n - phi(n) is a power of 2.

Table of values

n a(n)
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 11
9 12
10 13
11 14
12 16
13 17
14 19
15 23
16 24
17 28
18 29
19 31
20 32
21 37
22 41
23 43
24 47
25 48
26 53
27 56
28 59
29 61
30 62
31 64
32 67
33 71
34 73
35 79
36 83
37 89
38 96
39 97
40 101
41 103
42 107
43 109
44 112
45 113
46 124
47 127
48 128
49 131
50 137
51 139
52 149
53 151
54 157
55 163
56 167
57 173
58 179
59 181
60 191
61 192
62 193
63 197

List of values

[2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 16, 17, 19, 23, 24, 28, 29, 31, 32, 37, 41, 43, 47, 48, 53, 56, 59, 61, 62, 64, 67, 71, 73, 79, 83, 89, 96, 97, 101, 103, 107, 109, 112, 113, 124, 127, 128, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 192, 193, 197]