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A066409
as a simple table
n
a(n)
1
1
2
2
3
1
4
4
5
13
6
22
7
33
8
103
9
195
10
381
11
934
12
1858
13
3747
14
9166
15
31279
[1,2,1,4,13,22,33,103,195,381,934,1858,3747,9166, 31279]