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A363003
as a simple table
n
a(n)
0
1
1
1
2
2
3
6
4
26
5
166
6
1562
7
21614
8
438594
9
13032614
10
566069882
[1,1,2,6,26,166,1562,21614,438594,13032614, 566069882]
