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A317889
as a simple table
n
a(n)
1
0
2
1
3
4
4
82
5
6193
6
1184196
7
580702029
8
736219004144
9
2388442704194600
10
19885239768168130210
[0,1,4,82,6193,1184196,580702029,736219004144, 2388442704194600,19885239768168130210]