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A065507
as a simple table
n
a(n)
1
3
2
3
3
5
4
3
5
5
6
3
7
7
8
17
9
11
10
7
11
109
12
5
13
17
14
5
15
5
16
21943
17
17
18
7
19
3
20
5
21
7
22
3
23
19
24
13
[3,3,5,3,5,3,7,17,11,7,109,5,17,5,5,21943,17,7,3, 5,7,3,19,13]