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A003015
as a simple table
n
a(n)
1
1
2
120
3
210
4
1540
5
3003
6
7140
7
11628
8
24310
9
61218182743304701891431482520
[1,120,210,1540,3003,7140,11628,24310, 61218182743304701891431482520]