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A166501 as a simple table

na(n)
13
27
331
473
579
697
7313
8331
9349
10379
11397
12541
13571
14709
15739
16757
17769
18937
19967
203037
213061
223067
233121
243163
253187
263217
273229
283253
293313
303319
313361
323433
333457
343529
353547
363613
373631
383643
393673
403739
413769
423847
433889
445011
455023
465101
475107

[3,7,31,73,79,97,313,331,349,379,397,541,571,709,
 739,757,769,937,967,3037,3061,3067,3121,3163,3187,
 3217,3229,3253,3313,3319,3361,3433,3457,3529,3547,
 3613,3631,3643,3673,3739,3769,3847,3889,5011,5023,
 5101,5107]