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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.

A279645 a(n) = not (n XOR (n shift 1)).

Table of values

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

List of values

[0, 0, 0, 1, 1, 0, 2, 3, 3, 2, 0, 1, 5, 4, 6, 7, 7, 6, 4, 5, 1, 0, 2, 3, 11, 10, 8, 9, 13, 12, 14, 15, 15, 14, 12, 13, 9, 8, 10, 11, 3, 2, 0, 1, 5, 4, 6, 7, 23, 22, 20, 21, 17, 16, 18, 19, 27, 26, 24, 25, 29, 28, 30, 31, 31, 30, 28, 29, 25, 24, 26, 27, 19, 18, 16]

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