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.

A318397 Triangle read by rows: T(n,k) = binomial(n,k)^2 * binomial(2*(n-k), n-k).

Table of values

n a(n)
0 1
1 2
2 1
3 6
4 8
5 1
6 20
7 54
8 18
9 1
10 70
11 320
12 216
13 32
14 1
15 252
16 1750
17 2000
18 600
19 50
20 1
21 924
22 9072
23 15750
24 8000
25 1350
26 72
27 1
28 3432
29 45276
30 111132
31 85750
32 24500
33 2646
34 98
35 1
36 12870
37 219648
38 724416
39 790272
40 343000
41 62720
42 4704
43 128
44 1
45 48620
46 1042470
47 4447872
48 6519744
49 4000752
50 1111320
51 141120
52 7776
53 162
54 1

List of values

[1, 2, 1, 6, 8, 1, 20, 54, 18, 1, 70, 320, 216, 32, 1, 252, 1750, 2000, 600, 50, 1, 924, 9072, 15750, 8000, 1350, 72, 1, 3432, 45276, 111132, 85750, 24500, 2646, 98, 1, 12870, 219648, 724416, 790272, 343000, 62720, 4704, 128, 1, 48620, 1042470, 4447872, 6519744, 4000752, 1111320, 141120, 7776, 162, 1]