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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.

A066574 LCM of numbers <= n and having a factor in common with n.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 12
7 7
8 24
9 18
10 120
11 11
12 360
13 13
14 840
15 180
16 1680
17 17
18 5040
19 19
20 5040
21 1260
22 55440
23 23
24 55440
25 300
26 720720
27 7560
28 720720
29 29
30 10810800
31 31
32 1441440
33 83160
34 24504480
35 2100
36 73513440
37 37
38 465585120
39 1081080
40 2327925600
41 41
42 1396755360

List of values

[1, 2, 3, 4, 5, 12, 7, 24, 18, 120, 11, 360, 13, 840, 180, 1680, 17, 5040, 19, 5040, 1260, 55440, 23, 55440, 300, 720720, 7560, 720720, 29, 10810800, 31, 1441440, 83160, 24504480, 2100, 73513440, 37, 465585120, 1081080, 2327925600, 41, 1396755360]

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

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