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A079570
as a simple table
n
a(n)
1
1
2
1
3
2
4
6
5
20
6
95
7
541
8
4102
9
37362
10
402950
11
5107471
12
83311628
13
2006365803
[1,1,2,6,20,95,541,4102,37362,402950,5107471, 83311628,2006365803]