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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.

A349629 Numerators of the Dirichlet inverse of the abundancy index, sigma(n)/n.

Table of values

n a(n)
1 1
2 -3
3 -4
4 1
5 -6
6 2
7 -8
8 0
9 1
10 9
11 -12
12 -2
13 -14
14 12
15 8
16 0
17 -18
18 -1
19 -20
20 -3
21 32
22 18
23 -24
24 0
25 1
26 21
27 0
28 -4
29 -30
30 -12
31 -32
32 0
33 16
34 27
35 48
36 1
37 -38
38 30
39 56
40 0
41 -42
42 -16
43 -44
44 -6
45 -2
46 36
47 -48
48 0
49 1
50 -3
51 24
52 -7
53 -54
54 0
55 72
56 0
57 80
58 45
59 -60
60 4
61 -62
62 48
63 -8
64 0
65 84
66 -24
67 -68
68 -9
69 32
70 -72
71 -72
72 0
73 -74
74 57
75 -4
76 -10
77 96
78 -28

List of values

[1, -3, -4, 1, -6, 2, -8, 0, 1, 9, -12, -2, -14, 12, 8, 0, -18, -1, -20, -3, 32, 18, -24, 0, 1, 21, 0, -4, -30, -12, -32, 0, 16, 27, 48, 1, -38, 30, 56, 0, -42, -16, -44, -6, -2, 36, -48, 0, 1, -3, 24, -7, -54, 0, 72, 0, 80, 45, -60, 4, -62, 48, -8, 0, 84, -24, -68, -9, 32, -72, -72, 0, -74, 57, -4, -10, 96, -28]

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