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A161218
as a simple table
n
a(n)
1
3
2
7
3
13
4
31
5
43
6
211
7
241
8
317
9
443
10
499
11
709
12
1097
13
1223
14
1459
15
1549
16
1663
17
1789
[3,7,13,31,43,211,241,317,443,499,709,1097,1223, 1459,1549,1663,1789]