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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.

A104548 Triangle read by rows giving coefficients of Bessel polynomial p_n(x).

Table of values

n a(n)
0 0
1 1
2 0
3 1
4 1
5 0
6 1
7 3
8 3
9 0
10 1
11 6
12 15
13 15
14 0
15 1
16 10
17 45
18 105
19 105
20 0
21 1
22 15
23 105
24 420
25 945
26 945
27 0
28 1
29 21
30 210
31 1260
32 4725
33 10395
34 10395
35 0
36 1
37 28
38 378
39 3150
40 17325
41 62370
42 135135
43 135135
44 0
45 1
46 36
47 630
48 6930
49 51975
50 270270
51 945945
52 2027025
53 2027025
54 0

List of values

[0, 1, 0, 1, 1, 0, 1, 3, 3, 0, 1, 6, 15, 15, 0, 1, 10, 45, 105, 105, 0, 1, 15, 105, 420, 945, 945, 0, 1, 21, 210, 1260, 4725, 10395, 10395, 0, 1, 28, 378, 3150, 17325, 62370, 135135, 135135, 0, 1, 36, 630, 6930, 51975, 270270, 945945, 2027025, 2027025, 0]