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.

A155495 Triangle read by rows: t(n,m) = binomial(2*n,2*m) * binomial(n,m).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 12
5 1
6 1
7 45
8 45
9 1
10 1
11 112
12 420
13 112
14 1
15 1
16 225
17 2100
18 2100
19 225
20 1
21 1
22 396
23 7425
24 18480
25 7425
26 396
27 1
28 1
29 637
30 21021
31 105105
32 105105
33 21021
34 637
35 1
36 1
37 960
38 50960
39 448448
40 900900
41 448448
42 50960
43 960
44 1
45 1
46 1377
47 110160
48 1559376
49 5513508
50 5513508
51 1559376
52 110160
53 1377
54 1

List of values

[1, 1, 1, 1, 12, 1, 1, 45, 45, 1, 1, 112, 420, 112, 1, 1, 225, 2100, 2100, 225, 1, 1, 396, 7425, 18480, 7425, 396, 1, 1, 637, 21021, 105105, 105105, 21021, 637, 1, 1, 960, 50960, 448448, 900900, 448448, 50960, 960, 1, 1, 1377, 110160, 1559376, 5513508, 5513508, 1559376, 110160, 1377, 1]