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.

A069193 a(n) = Sum_{d|n} d*phi(n)/phi(d).

Table of values

n a(n)
1 1
2 3
3 5
4 10
5 9
6 15
7 13
8 28
9 24
10 27
11 21
12 50
13 25
14 39
15 45
16 72
17 33
18 72
19 37
20 90
21 65
22 63
23 45
24 140
25 70
26 75
27 99
28 130
29 57
30 135
31 61
32 176
33 105
34 99
35 117
36 240
37 73
38 111
39 125
40 252
41 81
42 195
43 85
44 210
45 216
46 135
47 93
48 360
49 140
50 210
51 165
52 250
53 105
54 297
55 189
56 364
57 185
58 171
59 117
60 450

List of values

[1, 3, 5, 10, 9, 15, 13, 28, 24, 27, 21, 50, 25, 39, 45, 72, 33, 72, 37, 90, 65, 63, 45, 140, 70, 75, 99, 130, 57, 135, 61, 176, 105, 99, 117, 240, 73, 111, 125, 252, 81, 195, 85, 210, 216, 135, 93, 360, 140, 210, 165, 250, 105, 297, 189, 364, 185, 171, 117, 450]