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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.

A301506 Number of integers less than or equal to n whose largest prime factor is 5.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 1
6 1
7 1
8 1
9 1
10 2
11 2
12 2
13 2
14 2
15 3
16 3
17 3
18 3
19 3
20 4
21 4
22 4
23 4
24 4
25 5
26 5
27 5
28 5
29 5
30 6
31 6
32 6
33 6
34 6
35 6
36 6
37 6
38 6
39 6
40 7
41 7
42 7
43 7
44 7
45 8
46 8
47 8
48 8
49 8
50 9
51 9
52 9
53 9
54 9
55 9
56 9
57 9
58 9
59 9
60 10
61 10
62 10
63 10
64 10
65 10
66 10
67 10
68 10
69 10
70 10
71 10
72 10
73 10
74 10
75 11
76 11
77 11
78 11
79 11

List of values

[0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11]

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