cp's OEIS Frontend

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.

A353686 Numbers k for which phi(sigma(k)) < phi(k).

Table of values

n a(n)
1 5
2 7
3 11
4 13
5 17
6 19
7 23
8 27
9 29
10 31
11 33
12 35
13 37
14 38
15 41
16 43
17 47
18 49
19 51
20 53
21 55
22 57
23 58
24 59
25 61
26 65
27 67
28 69
29 71
30 73
31 77
32 79
33 82
34 83
35 85
36 86
37 87
38 89
39 91
40 95
41 97
42 99
43 101
44 103
45 107
46 109
47 113
48 115
49 116
50 118
51 119
52 121
53 123
54 125
55 127
56 129
57 131
58 133
59 134
60 135
61 137
62 139
63 141
64 143
65 145
66 147
67 149
68 151
69 153
70 155
71 157
72 158
73 159

List of values

[5, 7, 11, 13, 17, 19, 23, 27, 29, 31, 33, 35, 37, 38, 41, 43, 47, 49, 51, 53, 55, 57, 58, 59, 61, 65, 67, 69, 71, 73, 77, 79, 82, 83, 85, 86, 87, 89, 91, 95, 97, 99, 101, 103, 107, 109, 113, 115, 116, 118, 119, 121, 123, 125, 127, 129, 131, 133, 134, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 158, 159]