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A145354 as a simple table

na(n)
15
27
317
423
537
643
767
873
9101
10113
11149
12157
13197
14211
15257
16277
17331
18347
19401
20421
21487
22509
23577
24601
25677
26709
27787
28821
29907
30937
311031
321061
331163
341193
351297
361361
371447
381483
391601
401657
411777
421811
431949
441987
452129
462179
472309
482357
492503
502551

[5,7,17,23,37,43,67,73,101,113,149,157,197,211,
 257,277,331,347,401,421,487,509,577,601,677,709,
 787,821,907,937,1031,1061,1163,1193,1297,1361,
 1447,1483,1601,1657,1777,1811,1949,1987,2129,2179,
 2309,2357,2503,2551]