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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.

A290599 Number of numbers from 1 to A002808(n) - 1 that are non-coprime to A002808(n).

Table of values

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

List of values

[1, 3, 3, 2, 5, 7, 7, 6, 7, 11, 11, 8, 11, 15, 4, 13, 8, 15, 21, 15, 12, 17, 10, 23, 19, 14, 23, 29, 23, 20, 23, 31, 6, 29, 18, 27, 35, 14, 31, 20, 29, 43, 31, 26, 31, 16, 45, 35, 24, 45, 47, 37, 34, 39, 16, 53, 47, 26, 41, 59, 20, 43, 30, 47, 65, 18, 47, 32, 47, 22, 63, 55, 38, 59]

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