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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.

A287318 Square array A(n,k) = (2*n)! [x^n] BesselI(0, 2*sqrt(x))^k read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 2
5 0
6 1
7 4
8 6
9 0
10 1
11 6
12 36
13 20
14 0
15 1
16 8
17 90
18 400
19 70
20 0
21 1
22 10
23 168
24 1860
25 4900
26 252
27 0
28 1
29 12
30 270
31 5120
32 44730
33 63504
34 924
35 0
36 1
37 14
38 396
39 10900
40 190120
41 1172556
42 853776
43 3432
44 0
45 1
46 16
47 546
48 19920
49 551950
50 7939008
51 32496156
52 11778624
53 12870
54 0

List of values

[1, 1, 0, 1, 2, 0, 1, 4, 6, 0, 1, 6, 36, 20, 0, 1, 8, 90, 400, 70, 0, 1, 10, 168, 1860, 4900, 252, 0, 1, 12, 270, 5120, 44730, 63504, 924, 0, 1, 14, 396, 10900, 190120, 1172556, 853776, 3432, 0, 1, 16, 546, 19920, 551950, 7939008, 32496156, 11778624, 12870, 0]