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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.

A349341 Dirichlet inverse of A026741, which is defined as n if n is odd, n/2 if n is even.

Table of values

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

List of values

[1, -1, -3, -1, -5, 3, -7, -1, 0, 5, -11, 3, -13, 7, 15, -1, -17, 0, -19, 5, 21, 11, -23, 3, 0, 13, 0, 7, -29, -15, -31, -1, 33, 17, 35, 0, -37, 19, 39, 5, -41, -21, -43, 11, 0, 23, -47, 3, 0, 0, 51, 13, -53, 0, 55, 7, 57, 29, -59, -15, -61, 31, 0, -1, 65, -33, -67, 17, 69, -35, -71, 0, -73, 37, 0, 19, 77, -39, -79]