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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.

A243348 Difference between the n-th squarefree number and n: a(n) = A005117(n) - n.

Table of values

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

List of values

[0, 0, 0, 1, 1, 1, 3, 3, 4, 4, 4, 5, 6, 7, 7, 7, 9, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 16, 16, 19, 20, 21, 22, 22, 22, 23, 23, 25, 25, 25, 26, 26, 26, 27, 27, 29, 29, 29, 31, 31, 32, 32, 32, 33, 34, 35, 35, 35, 36, 39, 39, 39, 40, 40, 40, 41, 41, 41, 42, 42, 42]

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