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A082104
as a simple table
n
a(n)
1
1
2
2
3
4
4
11
5
33
6
151
7
988
8
11453
9
247357
10
10608128
11
901029366
12
148187993520
[1,2,4,11,33,151,988,11453,247357,10608128, 901029366,148187993520]