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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.

A057627 Number of nonsquarefree numbers not exceeding n.

Table of values

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

List of values

[0, 0, 0, 1, 1, 1, 1, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 7, 7, 7, 7, 8, 9, 9, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 16, 16, 16, 17, 18, 19, 19, 20, 20, 21, 21, 22, 22, 22, 22, 23, 23, 23, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 28, 29, 29, 29]

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