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A216496
as a simple table
n
a(n)
1
2
2
3
3
5
4
7
5
11
6
13
7
17
8
19
9
31
10
37
11
47
12
61
13
67
14
71
15
73
16
89
17
109
18
137
19
179
20
211
21
277
22
337
23
379
24
499
25
557
[2,3,5,7,11,13,17,19,31,37,47,61,67,71,73,89,109, 137,179,211,277,337,379,499,557]