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A320868 as a simple table

na(n)
113
229
331
441
547
661
767
871
983
1097
11157
12193
13229
14241
15271
16283
17373
18397
19409
20431
21449
22467
23503
24587
25601
26607
27761
28787
29929
30971
31991
321039
331087
341091
351163
361181
371213
381217
391237
401249
411289
421291
431307
441423
451453
461471
471511
481543
491553
501559
511627
521657
531741
541811
551847
561867
571973
581999

[13,29,31,41,47,61,67,71,83,97,157,193,229,241,
 271,283,373,397,409,431,449,467,503,587,601,607,
 761,787,929,971,991,1039,1087,1091,1163,1181,1213,
 1217,1237,1249,1289,1291,1307,1423,1453,1471,1511,
 1543,1553,1559,1627,1657,1741,1811,1847,1867,1973,
 1999]