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A138802
as a simple table
n
a(n)
1
1
2
1
3
1
4
2
5
2
6
7
7
26
8
115
9
521
10
2502
11
12389
12
63236
13
330455
14
1762852
[1,1,1,2,2,7,26,115,521,2502,12389,63236,330455, 1762852]