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.

A007517 a(n) = phi(n) * (sigma(n) - n).

Table of values

n a(n)
1 0
2 1
3 2
4 6
5 4
6 12
7 6
8 28
9 24
10 32
11 10
12 64
13 12
14 60
15 72
16 120
17 16
18 126
19 18
20 176
21 132
22 140
23 22
24 288
25 120
26 192
27 234
28 336
29 28
30 336
31 30
32 496
33 300
34 320
35 312
36 660
37 36
38 396
39 408
40 800
41 40
42 648
43 42
44 800
45 792
46 572
47 46
48 1216
49 336
50 860
51 672
52 1104
53 52
54 1188
55 680

List of values

[0, 1, 2, 6, 4, 12, 6, 28, 24, 32, 10, 64, 12, 60, 72, 120, 16, 126, 18, 176, 132, 140, 22, 288, 120, 192, 234, 336, 28, 336, 30, 496, 300, 320, 312, 660, 36, 396, 408, 800, 40, 648, 42, 800, 792, 572, 46, 1216, 336, 860, 672, 1104, 52, 1188, 680]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.