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A372194
as a simple table
n
a(n)
0
0
1
0
2
0
3
1
4
2
5
7
6
23
7
102
8
526
9
3624
10
32240
11
382095
12
5986945
[0,0,0,1,2,7,23,102,526,3624,32240,382095,5986945]
