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A088257
as a simple table
n
a(n)
1
1
2
2
3
6
4
30
5
210
6
2310
7
30030
8
200560490130
9
304250263527210
10
23768741896345550770650537601358310
[1,2,6,30,210,2310,30030,200560490130, 304250263527210, 23768741896345550770650537601358310]