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A056040 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 6
5 30
6 20
7 140
8 70
9 630
10 252
11 2772
12 924
13 12012
14 3432
15 51480
16 12870
17 218790
18 48620
19 923780
20 184756
21 3879876
22 705432
23 16224936
24 2704156
25 67603900
26 10400600
27 280816200
28 40116600
29 1163381400
30 155117520
31 4808643120
32 601080390
33 19835652870
34 2333606220

[1,1,2,6,6,30,20,140,70,630,252,2772,924,12012,
 3432,51480,12870,218790,48620,923780,184756,
 3879876,705432,16224936,2704156,67603900,10400600,
 280816200,40116600,1163381400,155117520,
 4808643120,601080390,19835652870,2333606220]

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Last modified February 19 12:09 EST 2019. Contains 320310 sequences. (Running on oeis4.)