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A335865 as a simple table

na(n)
13
27
313
421
531
657
773
891
9133
10183
11273
12307
13381
14553
15651
16757
17871
18993
191057
201407
211723
221893
232257
242451
252863
263541
273783
284161
294557
305113
315403
326321
336643
346973
358011
369507
3710303
3810713
3911557
4011991
4112883
4214763
4315751

[3,7,13,21,31,57,73,91,133,183,273,307,381,553,
 651,757,871,993,1057,1407,1723,1893,2257,2451,
 2863,3541,3783,4161,4557,5113,5403,6321,6643,6973,
 8011,9507,10303,10713,11557,11991,12883,14763,
 15751]