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A143657
as a simple table
n
a(n)
1
1
2
1
3
2
4
5
5
12
6
32
7
95
8
301
9
1001
10
3495
11
12708
12
47932
13
186581
14
747619
15
3073207
[1,1,2,5,12,32,95,301,1001,3495,12708,47932, 186581,747619,3073207]