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.

A182411 Triangle T(n,k) = (2*k)!*(2*n)!/(k!*n!*(k+n)!) with k=0..n, read by rows.

Table of values

n a(n)
0 1
1 2
2 2
3 6
4 4
5 6
6 20
7 10
8 12
9 20
10 70
11 28
12 28
13 40
14 70
15 252
16 84
17 72
18 90
19 140
20 252
21 924
22 264
23 198
24 220
25 308
26 504
27 924
28 3432
29 858
30 572
31 572
32 728
33 1092
34 1848
35 3432
36 12870
37 2860
38 1716
39 1560
40 1820
41 2520
42 3960
43 6864
44 12870
45 48620
46 9724
47 5304
48 4420
49 4760
50 6120
51 8976

List of values

[1, 2, 2, 6, 4, 6, 20, 10, 12, 20, 70, 28, 28, 40, 70, 252, 84, 72, 90, 140, 252, 924, 264, 198, 220, 308, 504, 924, 3432, 858, 572, 572, 728, 1092, 1848, 3432, 12870, 2860, 1716, 1560, 1820, 2520, 3960, 6864, 12870, 48620, 9724, 5304, 4420, 4760, 6120, 8976]