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.

A174116 Triangle T(n, k) = (n/2)*binomial(n-1, k-1)*binomial(n-1, k) with T(n, 0) = T(n, n) = 1, read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 3
8 3
9 1
10 1
11 6
12 18
13 6
14 1
15 1
16 10
17 60
18 60
19 10
20 1
21 1
22 15
23 150
24 300
25 150
26 15
27 1
28 1
29 21
30 315
31 1050
32 1050
33 315
34 21
35 1
36 1
37 28
38 588
39 2940
40 4900
41 2940
42 588
43 28
44 1
45 1
46 36
47 1008
48 7056
49 17640
50 17640
51 7056
52 1008
53 36
54 1
55 1
56 45
57 1620
58 15120
59 52920
60 79380
61 52920
62 15120
63 1620
64 45
65 1

List of values

[1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 6, 18, 6, 1, 1, 10, 60, 60, 10, 1, 1, 15, 150, 300, 150, 15, 1, 1, 21, 315, 1050, 1050, 315, 21, 1, 1, 28, 588, 2940, 4900, 2940, 588, 28, 1, 1, 36, 1008, 7056, 17640, 17640, 7056, 1008, 36, 1, 1, 45, 1620, 15120, 52920, 79380, 52920, 15120, 1620, 45, 1]