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A277515 as a simple table

na(n)
13
23
33
43
57
63
73
83
93
1013
113
123
133
143
153
167
173
183
193
203
2111
223
233
243
253
263
2719
283
293
303
313
3211
333
343
353
363
373
3813
393
403
413
423
437
443
453
463
473
483
495
503
513
523
533
547
553
563
573
583
597
603
613
623
633
643
657
663
673
683
693
7011
713
723
733
743
753
767
773
783
793
803
8113
823
833
843
853
863
877
883
893
903
913
9219
933
943
953
963
973
985
993
1003

[3,3,3,3,7,3,3,3,3,13,3,3,3,3,3,7,3,3,3,3,11,3,3,
 3,3,3,19,3,3,3,3,11,3,3,3,3,3,13,3,3,3,3,7,3,3,3,
 3,3,5,3,3,3,3,7,3,3,3,3,7,3,3,3,3,3,7,3,3,3,3,11,
 3,3,3,3,3,7,3,3,3,3,13,3,3,3,3,3,7,3,3,3,3,19,3,3,
 3,3,3,5,3,3]