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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.

A213370 a(n) = n AND 2*n, where AND is the bitwise AND operator.

Table of values

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

List of values

[0, 0, 0, 2, 0, 0, 4, 6, 0, 0, 0, 2, 8, 8, 12, 14, 0, 0, 0, 2, 0, 0, 4, 6, 16, 16, 16, 18, 24, 24, 28, 30, 0, 0, 0, 2, 0, 0, 4, 6, 0, 0, 0, 2, 8, 8, 12, 14, 32, 32, 32, 34, 32, 32, 36, 38, 48, 48, 48, 50, 56, 56, 60, 62, 0, 0, 0, 2, 0, 0, 4, 6, 0, 0, 0, 2, 8, 8]

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