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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.

A110566 a(n) = lcm{1,2,...,n}/denominator of harmonic number H(n).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 1
6 3
7 3
8 3
9 1
10 1
11 1
12 1
13 1
14 1
15 1
16 1
17 1
18 3
19 3
20 15
21 45
22 45
23 45
24 15
25 3
26 3
27 1
28 1
29 1
30 1
31 1
32 1
33 11
34 11
35 11
36 11
37 11
38 11
39 11
40 11
41 11
42 77
43 77
44 7
45 7
46 7
47 7
48 7
49 1
50 1
51 1
52 1
53 1
54 3
55 3
56 3
57 3
58 3
59 3
60 3
61 3
62 3
63 9
64 9
65 9
66 27
67 27
68 27
69 9
70 9
71 9
72 3
73 3
74 3
75 3
76 3
77 33
78 33
79 33
80 33
81 11
82 11
83 11
84 11
85 11
86 11
87 11
88 1
89 1
90 1

List of values

[1, 1, 1, 1, 1, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 15, 45, 45, 45, 15, 3, 3, 1, 1, 1, 1, 1, 1, 11, 11, 11, 11, 11, 11, 11, 11, 11, 77, 77, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 9, 9, 9, 27, 27, 27, 9, 9, 9, 3, 3, 3, 3, 3, 33, 33, 33, 33, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1]