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.

A066694 Numbers k such that phi(sigma(k)) > k.

Table of values

n a(n)
1 4
2 9
3 16
4 18
5 25
6 32
7 36
8 48
9 50
10 64
11 72
12 81
13 84
14 98
15 100
16 112
17 144
18 156
19 162
20 192
21 196
22 200
23 225
24 252
25 256
26 288
27 289
28 300
29 324
30 336
31 338
32 372
33 392
34 400
35 432
36 448
37 450
38 468
39 484
40 512
41 576
42 578
43 624
44 625
45 648
46 676
47 700
48 722
49 729
50 756
51 768
52 784
53 800
54 882
55 900

List of values

[4, 9, 16, 18, 25, 32, 36, 48, 50, 64, 72, 81, 84, 98, 100, 112, 144, 156, 162, 192, 196, 200, 225, 252, 256, 288, 289, 300, 324, 336, 338, 372, 392, 400, 432, 448, 450, 468, 484, 512, 576, 578, 624, 625, 648, 676, 700, 722, 729, 756, 768, 784, 800, 882, 900]