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.

A247142 Numbers for which the root mean square of proper divisors is an integer.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 11
6 13
7 17
8 19
9 23
10 29
11 31
12 35
13 37
14 41
15 43
16 47
17 49
18 53
19 55
20 59
21 61
22 67
23 71
24 73
25 79
26 83
27 89
28 97
29 101
30 103
31 107
32 109
33 113
34 127
35 131
36 137
37 139
38 145
39 149
40 151
41 157
42 163
43 167
44 173
45 179
46 181
47 191
48 193
49 197
50 199
51 211
52 215
53 223
54 227
55 229
56 233
57 239
58 241
59 251
60 257
61 263
62 269
63 271
64 277
65 281
66 283
67 293
68 307
69 311
70 313
71 317
72 331
73 337
74 341

List of values

[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 35, 37, 41, 43, 47, 49, 53, 55, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 145, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 215, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 341]