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A291174
as a simple table
n
a(n)
1
2
2
3
3
6
4
12
5
14
6
26
7
30
8
42
9
186
10
210
11
2310
12
66990
13
903210
14
1037190
15
1138830
[2,3,6,12,14,26,30,42,186,210,2310,66990,903210, 1037190,1138830]