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.

A369869 a(n) = n * Sum_{p|n, p prime} pi(n/p) / p.

Table of values

n a(n)
1 0
2 0
3 0
4 2
5 0
6 8
7 0
8 8
9 6
10 17
11 0
12 26
13 0
14 30
15 21
16 32
17 0
18 54
19 0
20 48
21 34
22 57
23 0
24 92
25 15
26 80
27 36
28 92
29 0
30 148
31 0
32 96
33 61
34 121
35 43
36 186
37 0
38 154
39 84
40 192
41 0
42 270
43 0
44 184
45 126
46 209
47 0
48 312
49 28
50 265
51 125
52 242
53 0
54 369
55 70
56 284
57 158
58 292
59 0
60 520
61 0
62 343
63 204
64 352
65 93
66 557
67 0

List of values

[0, 0, 0, 2, 0, 8, 0, 8, 6, 17, 0, 26, 0, 30, 21, 32, 0, 54, 0, 48, 34, 57, 0, 92, 15, 80, 36, 92, 0, 148, 0, 96, 61, 121, 43, 186, 0, 154, 84, 192, 0, 270, 0, 184, 126, 209, 0, 312, 28, 265, 125, 242, 0, 369, 70, 284, 158, 292, 0, 520, 0, 343, 204, 352, 93, 557, 0]