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.

A061884 a(n) = Sum_{ d | n } phi(lcm(d,n/d)), where phi(n) = Euler totient A000010.

Table of values

n a(n)
1 1
2 2
3 4
4 5
5 8
6 8
7 12
8 12
9 14
10 16
11 20
12 20
13 24
14 24
15 32
16 26
17 32
18 28
19 36
20 40
21 48
22 40
23 44
24 48
25 44
26 48
27 48
28 60
29 56
30 64
31 60
32 56
33 80
34 64
35 96
36 70
37 72
38 72
39 96
40 96
41 80
42 96
43 84
44 100
45 112
46 88
47 92
48 104
49 90
50 88
51 128
52 120
53 104
54 96
55 160
56 144
57 144
58 112
59 116
60 160
61 120
62 120
63 168
64 116
65 192

List of values

[1, 2, 4, 5, 8, 8, 12, 12, 14, 16, 20, 20, 24, 24, 32, 26, 32, 28, 36, 40, 48, 40, 44, 48, 44, 48, 48, 60, 56, 64, 60, 56, 80, 64, 96, 70, 72, 72, 96, 96, 80, 96, 84, 100, 112, 88, 92, 104, 90, 88, 128, 120, 104, 96, 160, 144, 144, 112, 116, 160, 120, 120, 168, 116, 192]