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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.

A378643 Dirichlet inverse of A103977.

Table of values

n a(n)
1 1
2 -1
3 -2
4 0
5 -4
6 4
7 -6
8 0
9 -1
10 6
11 -10
12 -2
13 -12
14 8
15 10
16 0
17 -16
18 -3
19 -18
20 0
21 14
22 12
23 -22
24 0
25 -3
26 14
27 -2
28 2
29 -28
30 -28
31 -30
32 0
33 22
34 18
35 26
36 8
37 -36
38 20
39 26
40 -2
41 -40
42 -36
43 -42
44 2
45 4
46 24
47 -46
48 0
49 -5
50 -1
51 34
52 2
53 -52
54 4
55 42
56 -4
57 38
58 30
59 -58
60 18
61 -60
62 32
63 6
64 0
65 50
66 -52
67 -66
68 2
69 46
70 -44
71 -70
72 -4
73 -72
74 38
75 2
76 2
77 62
78 -60
79 -78
80 0

List of values

[1, -1, -2, 0, -4, 4, -6, 0, -1, 6, -10, -2, -12, 8, 10, 0, -16, -3, -18, 0, 14, 12, -22, 0, -3, 14, -2, 2, -28, -28, -30, 0, 22, 18, 26, 8, -36, 20, 26, -2, -40, -36, -42, 2, 4, 24, -46, 0, -5, -1, 34, 2, -52, 4, 42, -4, 38, 30, -58, 18, -60, 32, 6, 0, 50, -52, -66, 2, 46, -44, -70, -4, -72, 38, 2, 2, 62, -60, -78, 0]

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