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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.

A003002 Size of the largest subset of the numbers [1...n] which does not contain a 3-term arithmetic progression.

Table of values

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

List of values

[0, 1, 2, 2, 3, 4, 4, 4, 4, 5, 5, 6, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 11, 11, 11, 11, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 22, 22, 22, 22]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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