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.

A275245 Numbers k such that phi(k) divides k^2 while phi(k) does not divide k.

Table of values

n a(n)
1 10
2 20
3 40
4 42
5 50
6 60
7 80
8 84
9 100
10 114
11 120
12 126
13 136
14 156
15 160
16 168
17 180
18 200
19 220
20 228
21 240
22 250
23 252
24 272
25 294
26 300
27 312
28 320
29 336
30 342
31 360
32 378
33 400
34 440
35 444
36 456
37 468
38 480
39 500
40 504
41 540
42 544
43 588
44 600
45 624
46 640
47 672
48 684
49 720
50 756
51 800
52 816

List of values

[10, 20, 40, 42, 50, 60, 80, 84, 100, 114, 120, 126, 136, 156, 160, 168, 180, 200, 220, 228, 240, 250, 252, 272, 294, 300, 312, 320, 336, 342, 360, 378, 400, 440, 444, 456, 468, 480, 500, 504, 540, 544, 588, 600, 624, 640, 672, 684, 720, 756, 800, 816]