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A228567 as a simple table

na(n)
13
27
317
431
531
641
723
873
9127
1073
1189
12127
13463
14523
15241
16523
17157
18241
19523
20463
21211
22257
23131
24983
25379
261153
27311
281153
2983
30983
31521
324339
334339
34113
358893
364339
374339
381093
394339
40769
412851
428893
434339
441429
451097
464339
471093
484339
498893
504339
518893

[3,7,17,31,31,41,23,73,127,73,89,127,463,523,241,
 523,157,241,523,463,211,257,131,983,379,1153,311,
 1153,83,983,521,4339,4339,113,8893,4339,4339,1093,
 4339,769,2851,8893,4339,1429,1097,4339,1093,4339,
 8893,4339,8893]