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A178925
as a simple table
n
a(n)
1
1
2
2
3
4
4
11
5
32
6
146
7
934
8
10624
9
223629
10
9444562
11
803666188
12
134023600111
[1,2,4,11,32,146,934,10624,223629,9444562, 803666188,134023600111]