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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.

A063694 Remove odd-positioned bits from the binary expansion of n.

Table of values

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

List of values

[0, 1, 0, 1, 4, 5, 4, 5, 0, 1, 0, 1, 4, 5, 4, 5, 16, 17, 16, 17, 20, 21, 20, 21, 16, 17, 16, 17, 20, 21, 20, 21, 0, 1, 0, 1, 4, 5, 4, 5, 0, 1, 0, 1, 4, 5, 4, 5, 16, 17, 16, 17, 20, 21, 20, 21, 16, 17, 16, 17, 20, 21, 20, 21, 64, 65, 64, 65, 68, 69, 68, 69, 64, 65, 64, 65, 68, 69, 68]

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