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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.

A187324 a(n) = floor(n/2) + floor(n/3) - floor(n/4).

Table of values

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

List of values

[0, 0, 1, 2, 2, 2, 4, 4, 4, 5, 6, 6, 7, 7, 8, 9, 9, 9, 11, 11, 11, 12, 13, 13, 14, 14, 15, 16, 16, 16, 18, 18, 18, 19, 20, 20, 21, 21, 22, 23, 23, 23, 25, 25, 25, 26, 27, 27, 28, 28, 29, 30, 30, 30, 32, 32, 32, 33, 34, 34, 35, 35, 36, 37, 37, 37, 39, 39, 39, 40, 41, 41, 42, 42, 43, 44, 44, 44, 46, 46, 46, 47, 48]

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