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A181016
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
0
6
0
7
38
8
17807
9
10896780
10
9903117503
11
18595256962681
[0,0,0,0,0,0,38,17807,10896780,9903117503, 18595256962681]