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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.

A369455 Dirichlet convolution of A083345 with A055615 (Dirichlet inverse of n), where A083345(n) = (n'/gcd(n,n')) and n' is the arithmetic derivative of n.

Table of values

n a(n)
1 0
2 1
3 1
4 -1
5 1
6 0
7 1
8 1
9 -1
10 0
11 1
12 -3
13 1
14 0
15 0
16 -4
17 1
18 -6
19 1
20 -3
21 0
22 0
23 1
24 0
25 -3
26 0
27 -5
28 -3
29 1
30 0
31 1
32 1
33 0
34 0
35 0
36 9
37 1
38 0
39 0
40 0
41 1
42 0
43 1
44 -3
45 -6
46 0
47 1
48 -3
49 -5
50 -20
51 0
52 -3
53 1
54 -8
55 0
56 0
57 0
58 0
59 1
60 0
61 1
62 0
63 -6
64 -7
65 0
66 0
67 1
68 -3
69 0
70 0
71 1
72 -6
73 1
74 0
75 -20
76 -3
77 0
78 0
79 1
80 -3
81 1
82 0
83 1
84 0
85 0
86 0
87 0
88 0
89 1
90 0
91 0
92 -3
93 0
94 0
95 0
96 0
97 1
98 -42
99 -6
100 29

List of values

[0, 1, 1, -1, 1, 0, 1, 1, -1, 0, 1, -3, 1, 0, 0, -4, 1, -6, 1, -3, 0, 0, 1, 0, -3, 0, -5, -3, 1, 0, 1, 1, 0, 0, 0, 9, 1, 0, 0, 0, 1, 0, 1, -3, -6, 0, 1, -3, -5, -20, 0, -3, 1, -8, 0, 0, 0, 0, 1, 0, 1, 0, -6, -7, 0, 0, 1, -3, 0, 0, 1, -6, 1, 0, -20, -3, 0, 0, 1, -3, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, -3, 0, 0, 0, 0, 1, -42, -6, 29]