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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.

A055615 a(n) = n * mu(n), where mu is the Möbius function A008683.

Table of values

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

List of values

[1, -2, -3, 0, -5, 6, -7, 0, 0, 10, -11, 0, -13, 14, 15, 0, -17, 0, -19, 0, 21, 22, -23, 0, 0, 26, 0, 0, -29, -30, -31, 0, 33, 34, 35, 0, -37, 38, 39, 0, -41, -42, -43, 0, 0, 46, -47, 0, 0, 0, 51, 0, -53, 0, 55, 0, 57, 58, -59, 0, -61, 62, 0, 0, 65, -66, -67, 0, 69, -70, -71, 0]

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