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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.

A063743 Numbers n such that n and Omega(n) are relatively prime, where Omega(n) is the number of prime divisors of n (with repetition).

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 7
6 8
7 9
8 11
9 13
10 15
11 17
12 19
13 20
14 21
15 23
16 25
17 28
18 29
19 31
20 32
21 33
22 35
23 37
24 39
25 41
26 43
27 44
28 47
29 48
30 49
31 50
32 51
33 52
34 53
35 55
36 57
37 59
38 61
39 65
40 67
41 68
42 69
43 70
44 71
45 72
46 73
47 76
48 77
49 79
50 81
51 83
52 85
53 87
54 89
55 91
56 92
57 93
58 95
59 97
60 98
61 101
62 103
63 107
64 108
65 109
66 110
67 111
68 112

List of values

[1, 2, 3, 5, 7, 8, 9, 11, 13, 15, 17, 19, 20, 21, 23, 25, 28, 29, 31, 32, 33, 35, 37, 39, 41, 43, 44, 47, 48, 49, 50, 51, 52, 53, 55, 57, 59, 61, 65, 67, 68, 69, 70, 71, 72, 73, 76, 77, 79, 81, 83, 85, 87, 89, 91, 92, 93, 95, 97, 98, 101, 103, 107, 108, 109, 110, 111, 112]

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

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