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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.

A341200 Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} j^k * (n-j)! * binomial(n,j)^2.

Table of values

n a(n)
0 1
1 0
2 2
3 0
4 1
5 7
6 0
7 1
8 6
9 34
10 0
11 1
12 8
13 39
14 209
15 0
16 1
17 12
18 63
19 292
20 1546
21 0
22 1
23 20
24 117
25 544
26 2505
27 13327
28 0
29 1
30 36
31 243
32 1168
33 5225
34 24306
35 130922
36 0
37 1
38 68
39 549
40 2800
41 12525
42 55656
43 263431
44 1441729
45 0
46 1
47 132
48 1323
49 7312
50 33425
51 145836
52 653023
53 3154824
54 17572114

List of values

[1, 0, 2, 0, 1, 7, 0, 1, 6, 34, 0, 1, 8, 39, 209, 0, 1, 12, 63, 292, 1546, 0, 1, 20, 117, 544, 2505, 13327, 0, 1, 36, 243, 1168, 5225, 24306, 130922, 0, 1, 68, 549, 2800, 12525, 55656, 263431, 1441729, 0, 1, 132, 1323, 7312, 33425, 145836, 653023, 3154824, 17572114]