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.

A334420 Numbers m such that sigma(d)/tau(d) is an integer for all divisors d of m.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 11
6 13
7 15
8 17
9 19
10 21
11 23
12 29
13 31
14 33
15 35
16 37
17 39
18 41
19 43
20 47
21 49
22 51
23 53
24 55
25 57
26 59
27 61
28 65
29 67
30 69
31 71
32 73
33 77
34 79
35 83
36 85
37 87
38 89
39 91
40 93
41 95
42 97
43 101
44 103
45 105
46 107
47 109
48 111
49 113
50 115
51 119
52 123
53 127
54 129
55 131
56 133
57 137
58 139
59 141
60 143
61 145

List of values

[1, 3, 5, 7, 11, 13, 15, 17, 19, 21, 23, 29, 31, 33, 35, 37, 39, 41, 43, 47, 49, 51, 53, 55, 57, 59, 61, 65, 67, 69, 71, 73, 77, 79, 83, 85, 87, 89, 91, 93, 95, 97, 101, 103, 105, 107, 109, 111, 113, 115, 119, 123, 127, 129, 131, 133, 137, 139, 141, 143, 145]