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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.

A122937 3-Round numbers: numbers n such that every number less than n and relatively prime to n has at most three prime factors (counting multiplicities).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12
13 13
14 14
15 15
16 16
17 18
18 20
19 22
20 24
21 26
22 28
23 30
24 32
25 34
26 36
27 38
28 40
29 42
30 44
31 46
32 48
33 50
34 52
35 54
36 56
37 58
38 60
39 62
40 64
41 66
42 68
43 70
44 72
45 74
46 76
47 78
48 80
49 84
50 90
51 96
52 102
53 108
54 114
55 120
56 126
57 132
58 138
59 144
60 150
61 156
62 162
63 168
64 174
65 180
66 186
67 192

List of values

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 84, 90, 96, 102, 108, 114, 120, 126, 132, 138, 144, 150, 156, 162, 168, 174, 180, 186, 192]

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

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