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A138071 as a simple table

na(n)
13
23
31
43
53
61
74
81
93
103
111
124
131
144
151
163
173
181
194
201
215
221
234
241
253
263
271
284
291
305
319
325
331
344
351
363
373
381
394
401
415
429
432
449
455
461
474
481
493
503
511
524
531
545
559
562
576
582
599
605
611
624
631
643
653
661
674
681
695
709
712
726
735
746
752
769
775
781
794
801
813

[3,3,1,3,3,1,4,1,3,3,1,4,1,4,1,3,3,1,4,1,5,1,4,1,
 3,3,1,4,1,5,9,5,1,4,1,3,3,1,4,1,5,9,2,9,5,1,4,1,3,
 3,1,4,1,5,9,2,6,2,9,5,1,4,1,3,3,1,4,1,5,9,2,6,5,6,
 2,9,5,1,4,1,3]