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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.

A076902 a(1)=1, a(n) = floor(n/2) - a(floor(n/2)).

Table of values

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

List of values

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

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