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A286527
as a simple table
n
a(n)
1
1
2
6
3
70
4
210
5
2622
6
9282
7
277134
8
1159710
9
8064030
10
56185590
11
186605430
12
2748628830
13
5053814978
14
72641163166
[1,6,70,210,2622,9282,277134,1159710,8064030, 56185590,186605430,2748628830,5053814978, 72641163166]