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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.

A378991 Dirichlet inverse of the Möbius transform of A005187, where A005187(n) = 2*n - (number of 1's in binary representation of n).

Table of values

n a(n)
1 1
2 -2
3 -3
4 0
5 -7
6 8
7 -10
8 0
9 -3
10 20
11 -18
12 -4
13 -22
14 28
15 27
16 0
17 -31
18 6
19 -34
20 -12
21 35
22 52
23 -41
24 0
25 10
26 64
27 11
28 -16
29 -53
30 -104
31 -56
32 0
33 66
34 92
35 91
36 4
37 -70
38 100
39 84
40 0
41 -78
42 -132
43 -81
44 -32
45 21
46 120
47 -88
48 0
49 16
50 -66
51 123
52 -40
53 -101
54 -56
55 173
56 0
57 132
58 156
59 -112
60 124
61 -116
62 164
63 51
64 0
65 210
66 -256
67 -130
68 -60
69 156
70 -364
71 -137

List of values

[1, -2, -3, 0, -7, 8, -10, 0, -3, 20, -18, -4, -22, 28, 27, 0, -31, 6, -34, -12, 35, 52, -41, 0, 10, 64, 11, -16, -53, -104, -56, 0, 66, 92, 91, 4, -70, 100, 84, 0, -78, -132, -81, -32, 21, 120, -88, 0, 16, -66, 123, -40, -101, -56, 173, 0, 132, 156, -112, 124, -116, 164, 51, 0, 210, -256, -130, -60, 156, -364, -137]