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A208247 as a simple table

na(n)
12
23
3119
4127
5163
6179
7191
8193
9217
10219
11221
12223
13239
14251
15269
16311
17337
18343
19389
20403
21415
22419
23427
24431
25457
26491
27505
28547
29557
30569
31575
32581
33583
34597
35599
36613
37653
38659
39667
40671
41673
42683
43697
44719
45739
46749
47767
48779
49787
50799
51807
52817

[2,3,119,127,163,179,191,193,217,219,221,223,239,
 251,269,311,337,343,389,403,415,419,427,431,457,
 491,505,547,557,569,575,581,583,597,599,613,653,
 659,667,671,673,683,697,719,739,749,767,779,787,
 799,807,817]