cp's OEIS Frontend

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.

A190906 a(n) = gcd(n! / floor(n/2)!^2, 3^n).

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 3
5 3
6 1
7 1
8 1
9 9
10 9
11 9
12 3
13 3
14 3
15 9
16 9
17 9
18 1
19 1
20 1
21 3
22 3
23 3
24 1
25 1
26 1
27 27
28 27
29 27
30 9
31 9
32 9
33 27
34 27
35 27
36 3
37 3
38 3
39 9
40 9
41 9
42 3
43 3
44 3
45 27
46 27
47 27
48 9
49 9
50 9
51 27
52 27
53 27
54 1
55 1
56 1
57 3
58 3
59 3
60 1
61 1
62 1
63 9
64 9
65 9
66 3
67 3
68 3
69 9
70 9
71 9
72 1
73 1
74 1
75 3
76 3
77 3
78 1
79 1
80 1

List of values

[1, 1, 1, 3, 3, 3, 1, 1, 1, 9, 9, 9, 3, 3, 3, 9, 9, 9, 1, 1, 1, 3, 3, 3, 1, 1, 1, 27, 27, 27, 9, 9, 9, 27, 27, 27, 3, 3, 3, 9, 9, 9, 3, 3, 3, 27, 27, 27, 9, 9, 9, 27, 27, 27, 1, 1, 1, 3, 3, 3, 1, 1, 1, 9, 9, 9, 3, 3, 3, 9, 9, 9, 1, 1, 1, 3, 3, 3, 1, 1, 1]