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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.

A085970 Number of integers ranging from 2 to n that are not prime-powers.

Table of values

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

List of values

[0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 5, 6, 6, 7, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 15, 16, 17, 17, 18, 19, 20, 20, 21, 21, 22, 23, 24, 24, 25, 25, 26, 27, 28, 28, 29, 30, 31, 32, 33, 33, 34, 34, 35, 36, 36, 37, 38, 38, 39, 40, 41, 41, 42, 42, 43]

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

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