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A146602
as a simple table
n
a(n)
1
1
2
1
3
1
4
9
5
29
6
137
7
1079
8
13093
9
250867
10
6233403
11
218750525
12
11495073517
13
872282781415
[1,1,1,9,29,137,1079,13093,250867,6233403, 218750525,11495073517,872282781415]