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A092564
as a simple table
n
a(n)
1
3
2
5
3
7
4
11
5
17
6
29
7
41
8
47
9
53
10
59
11
71
12
83
13
89
14
97
15
113
16
137
17
173
18
179
19
191
20
227
21
239
22
257
[3,5,7,11,17,29,41,47,53,59,71,83,89,97,113,137, 173,179,191,227,239,257]