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A191021 as a simple table

na(n)
12
23
313
429
531
641
747
859
971
1073
11101
12127
13131
14139
15151
16163
17167
18173
19179
20193
21197
22211
23223
24233
25239
26257
27269
28271
29277
30307
31311
32317
33331
34347
35349
36353
37397
38409
39439
40443
41449
42461
43463
44487
45491
46499
47509
48541
49547
50577
51587
52593
53599
54601

[2,3,13,29,31,41,47,59,71,73,101,127,131,139,151,
 163,167,173,179,193,197,211,223,233,239,257,269,
 271,277,307,311,317,331,347,349,353,397,409,439,
 443,449,461,463,487,491,499,509,541,547,577,587,
 593,599,601]