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A256712 as a simple table

na(n)
12
23
313
429
589
6113
7199
8229
9263
10281
11317
12337
13349
14541
15593
16673
17683
18827
19857
20911
21929
22971
23997
241069
251109
261291
271399
281481
291657
301693
311733
321759
331783
341877
351907
361931
372003
382053
392089
402377
412543
422551
432777
442903
453011
463023
473041
483089
493181
503251
513361
523617
533671

[2,3,13,29,89,113,199,229,263,281,317,337,349,541,
 593,673,683,827,857,911,929,971,997,1069,1109,
 1291,1399,1481,1657,1693,1733,1759,1783,1877,1907,
 1931,2003,2053,2089,2377,2543,2551,2777,2903,3011,
 3023,3041,3089,3181,3251,3361,3617,3671]