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A374390
as a simple table
n
a(n)
0
1
1
0
2
4
3
36
4
1936
5
144260
6
31972988
7
6800311204
8
2560967581304
9
975834087080060
10
557171087172087364
[1,0,4,36,1936,144260,31972988,6800311204, 2560967581304,975834087080060,557171087172087364]