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.

A062562 a(n) = Sum_{k=1..n} mu(k)*sigma(k).

Table of values

n a(n)
0 0
1 1
2 -2
3 -6
4 -6
5 -12
6 0
7 -8
8 -8
9 -8
10 10
11 -2
12 -2
13 -16
14 8
15 32
16 32
17 14
18 14
19 -6
20 -6
21 26
22 62
23 38
24 38
25 38
26 80
27 80
28 80
29 50
30 -22
31 -54
32 -54
33 -6
34 48
35 96
36 96
37 58
38 118
39 174
40 174
41 132
42 36
43 -8
44 -8
45 -8
46 64
47 16
48 16
49 16
50 16
51 88
52 88
53 34
54 34
55 106
56 106
57 186
58 276
59 216
60 216
61 154
62 250
63 250
64 250
65 334
66 190
67 122
68 122
69 218
70 74
71 2
72 2
73 -72
74 42
75 42
76 42

List of values

[0, 1, -2, -6, -6, -12, 0, -8, -8, -8, 10, -2, -2, -16, 8, 32, 32, 14, 14, -6, -6, 26, 62, 38, 38, 38, 80, 80, 80, 50, -22, -54, -54, -6, 48, 96, 96, 58, 118, 174, 174, 132, 36, -8, -8, -8, 64, 16, 16, 16, 16, 88, 88, 34, 34, 106, 106, 186, 276, 216, 216, 154, 250, 250, 250, 334, 190, 122, 122, 218, 74, 2, 2, -72, 42, 42, 42]