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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.

A204330 a(n) is the number of k satisfying 1 <= k <= n and such that floor(sqrt(k)) divides k.

Table of values

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

List of values

[1, 2, 3, 4, 4, 5, 5, 6, 7, 7, 7, 8, 8, 8, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 18, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 21, 22, 22, 22, 22, 22, 22, 22]

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

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