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.

A361830 Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} binomial(2*j,j) * binomial(k*j,n-j).

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 2
5 6
6 1
7 2
8 8
9 20
10 1
11 2
12 10
13 32
14 70
15 1
16 2
17 12
18 46
19 136
20 252
21 1
22 2
23 14
24 62
25 226
26 592
27 924
28 1
29 2
30 16
31 80
32 342
33 1136
34 2624
35 3432
36 1
37 2
38 18
39 100
40 486
41 1932
42 5810
43 11776
44 12870
45 1
46 2
47 20
48 122
49 660
50 3030
51 11094
52 30080
53 53344
54 48620

List of values

[1, 1, 2, 1, 2, 6, 1, 2, 8, 20, 1, 2, 10, 32, 70, 1, 2, 12, 46, 136, 252, 1, 2, 14, 62, 226, 592, 924, 1, 2, 16, 80, 342, 1136, 2624, 3432, 1, 2, 18, 100, 486, 1932, 5810, 11776, 12870, 1, 2, 20, 122, 660, 3030, 11094, 30080, 53344, 48620]