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A243565
as a simple table
n
a(n)
1
1
2
1
3
2
4
4
5
11
6
38
7
159
8
882
9
6242
10
55316
11
578130
12
6774786
[1,1,2,4,11,38,159,882,6242,55316,578130,6774786]