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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.

A067003 Number of numbers <= n with same number of distinct prime factors as n.

Table of values

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

List of values

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

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

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