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.

A180097 Numbers n such that sigma(n) is powerful.

Table of values

n a(n)
1 1
2 3
3 7
4 21
5 22
6 30
7 31
8 46
9 51
10 55
11 66
12 70
13 71
14 81
15 85
16 93
17 94
18 102
19 107
20 110
21 115
22 119
23 127
24 138
25 142
26 154
27 156
28 159
29 165
30 170
31 187
32 199
33 210
34 213
35 214
36 217
37 230
38 235
39 238
40 253
41 255
42 265
43 282
44 291
45 310
46 318
47 321
48 322
49 330
50 343
51 345
52 355
53 357
54 364
55 371
56 374

List of values

[1, 3, 7, 21, 22, 30, 31, 46, 51, 55, 66, 70, 71, 81, 85, 93, 94, 102, 107, 110, 115, 119, 127, 138, 142, 154, 156, 159, 165, 170, 187, 199, 210, 213, 214, 217, 230, 235, 238, 253, 255, 265, 282, 291, 310, 318, 321, 322, 330, 343, 345, 355, 357, 364, 371, 374]