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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.

A070920 a(n) = Card{ (x,y,z,u) | lcm(x,y,z,u)=n }.

Table of values

n a(n)
1 1
2 15
3 15
4 65
5 15
6 225
7 15
8 175
9 65
10 225
11 15
12 975
13 15
14 225
15 225
16 369
17 15
18 975
19 15
20 975
21 225
22 225
23 15
24 2625
25 65
26 225
27 175
28 975
29 15
30 3375
31 15
32 671
33 225
34 225
35 225
36 4225
37 15
38 225
39 225
40 2625
41 15
42 3375
43 15
44 975
45 975
46 225
47 15
48 5535
49 65
50 975
51 225
52 975
53 15
54 2625
55 225

List of values

[1, 15, 15, 65, 15, 225, 15, 175, 65, 225, 15, 975, 15, 225, 225, 369, 15, 975, 15, 975, 225, 225, 15, 2625, 65, 225, 175, 975, 15, 3375, 15, 671, 225, 225, 225, 4225, 15, 225, 225, 2625, 15, 3375, 15, 975, 975, 225, 15, 5535, 65, 975, 225, 975, 15, 2625, 225]

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

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