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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.

A173276 a(n) = a(n-2) + a(n-3) - floor(a(n-3)/2) - floor(a(n-4)/2).

Table of values

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

List of values

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

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