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A173620
as a simple table
n
a(n)
1
2
2
5
3
13
4
8
5
89
6
233
7
233
8
1597
9
39088169
10
121393
11
4052739537881
[2,5,13,8,89,233,233,1597,39088169,121393, 4052739537881]