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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.

A362914 a(n) = size of largest subset of {1..n} such that no difference between two terms is a prime.

Table of values

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

List of values

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

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

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