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.

A368642 a(n) = Sum_{k=1..n} mu(k)^2 * ceiling(n/k), where mu is the Möbius function (A008683).

Table of values

n a(n)
1 1
2 3
3 6
4 8
5 11
6 14
7 19
8 21
9 23
10 26
11 31
12 33
13 38
14 41
15 46
16 50
17 53
18 55
19 60
20 62
21 67
22 72
23 77
24 79
25 83
26 86
27 90
28 92
29 97
30 100
31 109
32 111
33 114
34 119
35 124
36 128
37 133
38 136
39 141
40 145
41 150
42 153
43 162
44 164
45 168
46 173
47 178
48 180
49 184
50 186
51 191
52 195
53 200
54 202
55 207
56 211
57 216
58 221
59 226
60 228

List of values

[1, 3, 6, 8, 11, 14, 19, 21, 23, 26, 31, 33, 38, 41, 46, 50, 53, 55, 60, 62, 67, 72, 77, 79, 83, 86, 90, 92, 97, 100, 109, 111, 114, 119, 124, 128, 133, 136, 141, 145, 150, 153, 162, 164, 168, 173, 178, 180, 184, 186, 191, 195, 200, 202, 207, 211, 216, 221, 226, 228]