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A214506 as a simple table

na(n)
12
21
31
49
57
63
73
89
97
107
119
123
139
147
151
167
171
183
193
201
219
227
239
247
257
263
277
283
291
309
317
323
339
341
353
369
377
383
393
403
411
429
433
447
451
469
471
483
493
509
511
521
537
541
551
561
573
589
599
609
617
623
637
641
657
669
679
689
699
709
713
723
739
749
757
769
773
781
793
809
819
823
831
847
851
863

[2,1,1,9,7,3,3,9,7,7,9,3,9,7,1,7,1,3,3,1,9,7,9,7,
 7,3,7,3,1,9,7,3,9,1,3,9,7,3,3,3,1,9,3,7,1,9,1,3,3,
 9,1,1,7,1,1,1,3,9,9,9,7,3,7,1,7,9,9,9,9,9,3,3,9,9,
 7,9,3,1,3,9,9,3,1,7,1,3]