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A140561 as a simple table

na(n)
12
23
35
47
511
637
743
879
989
10109
11113
12131
13151
14167
15181
16193
17197
18227
19241
20263
21271
22283
23307
24317
25349
26373
27379
28401
29419
30439
31457
32461
33479
34487
35503
36521
37557
38569
39571
40593
41607
42631
43641
44659
45661
46683
47691
48733
49739
50751
51769
52797
53827
54857
55863

[2,3,5,7,11,37,43,79,89,109,113,131,151,167,181,
 193,197,227,241,263,271,283,307,317,349,373,379,
 401,419,439,457,461,479,487,503,521,557,569,571,
 593,607,631,641,659,661,683,691,733,739,751,769,
 797,827,857,863]