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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.

A384210 Number of numbers <= n of the form p * m^2, where p is a prime and m is an integer >= 1.

Table of values

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

List of values

[0, 1, 2, 2, 3, 3, 4, 5, 5, 5, 6, 7, 8, 8, 8, 8, 9, 10, 11, 12, 12, 12, 13, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 21, 22, 23, 23, 24, 25, 25, 26, 26, 27, 28, 28, 28, 28, 28, 28, 29, 29, 30, 30, 31, 31, 31, 31, 32, 33, 33, 33, 34, 35, 36, 36, 37]

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

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