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A290366
as a simple table
n
a(n)
1
1
2
1
3
1
4
3
5
3
6
45
7
15
8
105
9
105
10
1575
11
63
12
2079
13
693
14
63063
[1,1,1,3,3,45,15,105,105,1575,63,2079,693,63063]