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.

A066993 Integer of the form phi(n)*sigma(n)/n.

Table of values

n a(n)
1 1
2 4
3 13
4 20
5 24
6 36
7 40
8 65
9 64
10 84
11 112
12 96
13 128
14 121
15 171
16 186
17 200
18 216
19 168
20 208
21 192
22 273
23 312
24 340
25 392
26 364
27 480
28 448
29 456
30 496
31 612
32 605
33 576
34 640
35 768
36 768
37 840
38 880
39 840
40 936
41 960
42 1105
43 992
44 1200
45 1093
46 1280
47 1464
48 1364
49 1152
50 1539
51 1152
52 1664
53 1482

List of values

[1, 4, 13, 20, 24, 36, 40, 65, 64, 84, 112, 96, 128, 121, 171, 186, 200, 216, 168, 208, 192, 273, 312, 340, 392, 364, 480, 448, 456, 496, 612, 605, 576, 640, 768, 768, 840, 880, 840, 936, 960, 1105, 992, 1200, 1093, 1280, 1464, 1364, 1152, 1539, 1152, 1664, 1482]