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A133568
as a simple table
n
a(n)
1
1
2
2
3
3
4
2
5
5
6
22
7
2
8
5
9
22
10
309
11
2
12
5
13
22
14
309
15
10431
[1,2,3,2,5,22,2,5,22,309,2,5,22,309,10431]