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.

A226703 Triangle read by rows: T(n,k) = binomial(2*n,k)*Stirling2(2*n-k,n).

Table of values

n a(n)
0 1
1 1
2 2
3 7
4 12
5 6
6 90
7 150
8 90
9 20
10 1701
11 2800
12 1820
13 560
14 70
15 42525
16 69510
17 47250
18 16800
19 3150
20 252
21 1323652
22 2153844
23 1506582
24 582120
25 131670
26 16632
27 924
28 49329280
29 80015936
30 57093036
31 23291268
32 5885880
33 924924
34 84084
35 3432
36 2141764053
37 3466045440
38 2509478400
39 1063782720
40 289429140
41 51891840
42 6006000
43 411840
44 12870

List of values

[1, 1, 2, 7, 12, 6, 90, 150, 90, 20, 1701, 2800, 1820, 560, 70, 42525, 69510, 47250, 16800, 3150, 252, 1323652, 2153844, 1506582, 582120, 131670, 16632, 924, 49329280, 80015936, 57093036, 23291268, 5885880, 924924, 84084, 3432, 2141764053, 3466045440, 2509478400, 1063782720, 289429140, 51891840, 6006000, 411840, 12870]