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A243960 as a simple table

na(n)
12
211
317
423
531
641
753
859
979
1083
11101
12113
13137
14149
15167
16179
17197
18229
19251
20263
21269
22281
23283
24311
25317
26331
27349
28383
29433
30439
31457
32461
33463
34479
35487
36499
37503
38509
39521
40547
41577
42593
43599
44619
45641
46661
47673
48683
49691
50709
51739
52769
53787
54809

[2,11,17,23,31,41,53,59,79,83,101,113,137,149,167,
 179,197,229,251,263,269,281,283,311,317,331,349,
 383,433,439,457,461,463,479,487,499,503,509,521,
 547,577,593,599,619,641,661,673,683,691,709,739,
 769,787,809]