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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.

A353369 Sum of A103391 ("even fractal sequence") and its Dirichlet inverse.

Table of values

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

List of values

[2, 0, 0, 4, 0, 8, 0, 4, 4, 8, 0, 4, 0, 12, 8, 9, 0, 0, 0, 12, 12, 16, 0, 16, 4, 12, 0, 14, 0, 12, 0, 16, 16, 8, 12, 36, 0, 24, 12, 20, 0, 0, 0, 24, 4, 28, 0, 24, 9, 12, 8, 38, 0, 56, 16, 30, 24, 20, 0, 34, 0, 36, -8, 32, 12, -8, 0, 60, 28, 36, 0, 20, 0, 24, 8, 44, 24, 52, 0, 44, 28, 16, 0, 74, 8, 48, 20, 44, 0, 52]