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A247057
as a simple table
n
a(n)
0
1
1
1
2
3
3
12
4
76
5
631
6
5952
7
61642
8
724536
9
10132749
10
169431706
[1,1,3,12,76,631,5952,61642,724536,10132749, 169431706]