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A071923 as a simple table

na(n)
17
213
319
437
541
667
773
8101
9107
10149
11163
12193
13227
14239
15281
16337
17353
18397
19433
20479
21523
22577
23607
24677
25733
26769
27829
28907
29953
301013
311091
321151
331229
341289
351373
361439
371489
381601
391667
401777
411867
421907
432027
442099
452237
462281
472389
482543
492591

[7,13,19,37,41,67,73,101,107,149,163,193,227,239,
 281,337,353,397,433,479,523,577,607,677,733,769,
 829,907,953,1013,1091,1151,1229,1289,1373,1439,
 1489,1601,1667,1777,1867,1907,2027,2099,2237,2281,
 2389,2543,2591]