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A086516
as a simple table
n
a(n)
1
2
2
3
3
7
4
3
5
11
6
29
7
17
8
7
9
11
10
23
11
7
12
53
13
29
14
31
15
3
16
103
17
7
18
191
19
11
20
43
21
23
22
47
23
7
24
11
25
53
26
7
[2,3,7,3,11,29,17,7,11,23,7,53,29,31,3,103,7,191, 11,43,23,47,7,11,53,7]