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.

A073040 Numbers n such that sum of proper divisors of n is a square.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 7
6 9
7 11
8 12
9 13
10 15
11 17
12 19
13 23
14 24
15 26
16 29
17 31
18 37
19 41
20 43
21 47
22 53
23 56
24 59
25 61
26 67
27 71
28 73
29 75
30 76
31 79
32 83
33 89
34 90
35 95
36 97
37 101
38 103
39 107
40 109
41 113
42 119
43 122
44 124
45 127
46 131
47 137
48 139
49 140
50 143
51 147
52 149
53 151
54 153
55 157
56 163
57 167
58 173
59 176
60 179
61 181
62 191

List of values

[1, 2, 3, 5, 7, 9, 11, 12, 13, 15, 17, 19, 23, 24, 26, 29, 31, 37, 41, 43, 47, 53, 56, 59, 61, 67, 71, 73, 75, 76, 79, 83, 89, 90, 95, 97, 101, 103, 107, 109, 113, 119, 122, 124, 127, 131, 137, 139, 140, 143, 147, 149, 151, 153, 157, 163, 167, 173, 176, 179, 181, 191]

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

Content is available under The OEIS End-User License Agreement.