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.

A347885 Odd numbers k such that sigma(k^2) has an odd number of prime factors when counted with multiplicity.

Table of values

n a(n)
1 3
2 5
3 17
4 21
5 27
6 33
7 35
8 37
9 39
10 41
11 45
12 49
13 55
14 57
15 59
16 61
17 65
18 69
19 71
20 75
21 87
22 89
23 93
24 95
25 101
26 107
27 109
28 115
29 119
30 125
31 129
32 131
33 137
34 139
35 141
36 145
37 149
38 151
39 153
40 155
41 159
42 167
43 169
44 173
45 181
46 187
47 189
48 193
49 201
50 215
51 219
52 221
53 229
54 231
55 235
56 237
57 249
58 255
59 259
60 265
61 269
62 273
63 283
64 287
65 289
66 291
67 293
68 297
69 307

List of values

[3, 5, 17, 21, 27, 33, 35, 37, 39, 41, 45, 49, 55, 57, 59, 61, 65, 69, 71, 75, 87, 89, 93, 95, 101, 107, 109, 115, 119, 125, 129, 131, 137, 139, 141, 145, 149, 151, 153, 155, 159, 167, 169, 173, 181, 187, 189, 193, 201, 215, 219, 221, 229, 231, 235, 237, 249, 255, 259, 265, 269, 273, 283, 287, 289, 291, 293, 297, 307]