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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.

A384042 The number of integers k from 1 to n such that gcd(n,k) is a 5-rough number (A007310).

Table of values

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

List of values

[1, 1, 2, 2, 5, 2, 7, 4, 6, 5, 11, 4, 13, 7, 10, 8, 17, 6, 19, 10, 14, 11, 23, 8, 25, 13, 18, 14, 29, 10, 31, 16, 22, 17, 35, 12, 37, 19, 26, 20, 41, 14, 43, 22, 30, 23, 47, 16, 49, 25, 34, 26, 53, 18, 55, 28, 38, 29, 59, 20, 61, 31, 42, 32, 65, 22, 67, 34, 46]

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

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