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.

A175200 Numbers k such that rad(k) divides sigma(k).

Table of values

n a(n)
1 1
2 6
3 24
4 28
5 40
6 54
7 96
8 120
9 135
10 216
11 224
12 234
13 270
14 360
15 384
16 486
17 496
18 540
19 588
20 600
21 640
22 672
23 864
24 891
25 936
26 1000
27 1080
28 1350
29 1372
30 1521
31 1536
32 1638
33 1782
34 1792
35 1920
36 1944
37 2016
38 2160
39 2176
40 3000
41 3240
42 3375
43 3402
44 3456
45 3564
46 3724
47 3744
48 3780
49 4320

List of values

[1, 6, 24, 28, 40, 54, 96, 120, 135, 216, 224, 234, 270, 360, 384, 486, 496, 540, 588, 600, 640, 672, 864, 891, 936, 1000, 1080, 1350, 1372, 1521, 1536, 1638, 1782, 1792, 1920, 1944, 2016, 2160, 2176, 3000, 3240, 3375, 3402, 3456, 3564, 3724, 3744, 3780, 4320]