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.

A379100 Triangle read by rows: T(n, k) = binomial(2*k, k) * binomial(2*n, n) / (n + 1).

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 4
5 12
6 5
7 10
8 30
9 100
10 14
11 28
12 84
13 280
14 980
15 42
16 84
17 252
18 840
19 2940
20 10584
21 132
22 264
23 792
24 2640
25 9240
26 33264
27 121968
28 429
29 858
30 2574
31 8580
32 30030
33 108108
34 396396
35 1472328
36 1430
37 2860
38 8580
39 28600
40 100100
41 360360
42 1321320
43 4907760
44 18404100

List of values

[1, 1, 2, 2, 4, 12, 5, 10, 30, 100, 14, 28, 84, 280, 980, 42, 84, 252, 840, 2940, 10584, 132, 264, 792, 2640, 9240, 33264, 121968, 429, 858, 2574, 8580, 30030, 108108, 396396, 1472328, 1430, 2860, 8580, 28600, 100100, 360360, 1321320, 4907760, 18404100]