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A173230 as a simple table

na(n)
17
213
337
461
573
6103
7151
8181
9241
10271
11277
12283
13313
14331
15367
16373
17397
18577
19601
20607
21661
22727
23751
24787
25853
26907
27937
281033
291063
301117
311171
321201
331321
341327
351381
361423
371453
381531
391567
401693
411777
421831
431873
441987
451993
462137
472161
482203
492221
502281
512287
522293
532347
542551
552593
562677
572767
582791
592851
602971
613037
623061
633163
643181
653307
663391

[7,13,37,61,73,103,151,181,241,271,277,283,313,
 331,367,373,397,577,601,607,661,727,751,787,853,
 907,937,1033,1063,1117,1171,1201,1321,1327,1381,
 1423,1453,1531,1567,1693,1777,1831,1873,1987,1993,
 2137,2161,2203,2221,2281,2287,2293,2347,2551,2593,
 2677,2767,2791,2851,2971,3037,3061,3163,3181,3307,
 3391]