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A147161
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
5
7
25
8
109
9
547
10
2673
11
15771
12
134989
13
1264235
[1,1,1,1,1,5,25,109,547,2673,15771,134989,1264235]