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A011802
as a simple table
n
a(n)
-1
1
0
2
1
7
2
42
3
392
4
5345
5
102050
6
2632429
7
89026966
8
3851458088
9
208865852153
[1,2,7,42,392,5345,102050,2632429,89026966, 3851458088,208865852153]