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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.

A181859 a(n) = gcd(n^2, n!) / gcd(n^2, n!/floor(n/2)!^2).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 4
5 1
6 9
7 1
8 32
9 9
10 25
11 1
12 12
13 1
14 49
15 5
16 128
17 1
18 81
19 1
20 100
21 21
22 121
23 1
24 144
25 25
26 169
27 27
28 98
29 1
30 5
31 1
32 512
33 11
34 289
35 7
36 108
37 1
38 361
39 13
40 80
41 1
42 147
43 1
44 242
45 3
46 529
47 1
48 64
49 49
50 625
51 17
52 338
53 1
54 729
55 55
56 56
57 57

List of values

[1, 1, 1, 1, 4, 1, 9, 1, 32, 9, 25, 1, 12, 1, 49, 5, 128, 1, 81, 1, 100, 21, 121, 1, 144, 25, 169, 27, 98, 1, 5, 1, 512, 11, 289, 7, 108, 1, 361, 13, 80, 1, 147, 1, 242, 3, 529, 1, 64, 49, 625, 17, 338, 1, 729, 55, 56, 57]