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A007529 as a simple table

na(n)
15
27
311
413
517
637
741
867
997
10101
11103
12107
13191
14193
15223
16227
17277
18307
19311
20347
21457
22461
23613
24641
25821
26823
27853
28857
29877
30881
311087
321091
331277
341297
351301
361423
371427
381447
391481
401483
411487
421607
431663
441693
451783
461867
471871
481873
491993
501997

[5,7,11,13,17,37,41,67,97,101,103,107,191,193,223,
 227,277,307,311,347,457,461,613,641,821,823,853,
 857,877,881,1087,1091,1277,1297,1301,1423,1427,
 1447,1481,1483,1487,1607,1663,1693,1783,1867,1871,
 1873,1993,1997]