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A106856 as a simple table

na(n)
12
211
323
437
543
653
771
879
9107
10109
11127
12137
13149
14151
15163
16193
17197
18211
19233
20239
21263
22281
23317
24331
25337
26373
27389
28401
29421
30431
31443
32463
33487
34491
35499
36541
37547
38557
39569
40599
41613
42617
43641
44653
45659
46673
47683
48739
49743
50751
51757
52809
53821

[2,11,23,37,43,53,71,79,107,109,127,137,149,151,
 163,193,197,211,233,239,263,281,317,331,337,373,
 389,401,421,431,443,463,487,491,499,541,547,557,
 569,599,613,617,641,653,659,673,683,739,743,751,
 757,809,821]