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A394814
as a simple table
n
a(n)
0
1
1
0
2
1
3
3
4
13
5
116
6
1380
7
19103
8
285975
9
4508313
10
73709922
[1,0,1,3,13,116,1380,19103,285975,4508313, 73709922]
