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A248972 as a simple table

na(n)
12
22
32
43
53
65
73
85
97
103
113
123
135
143
155
167
173
185
193
203
213
225
2313
243
253
263
275
283
295
307
315
3213
333
343
3513
363
3711
385
393
403
413
4211
433
4411
453
463
475
483
497
503
513
525
533
545
5511
563
573
585
5911
603
617
625
635
643
655
663
675
683
693
703
715
723
733
743
7519
763
773
783
797
807
813
823
8311
845
853
863
875
883
8911
905
913
927

[2,2,2,3,3,5,3,5,7,3,3,3,5,3,5,7,3,5,3,3,3,5,13,3,
 3,3,5,3,5,7,5,13,3,3,13,3,11,5,3,3,3,11,3,11,3,3,
 5,3,7,3,3,5,3,5,11,3,3,5,11,3,7,5,5,3,5,3,5,3,3,3,
 5,3,3,3,19,3,3,3,7,7,3,3,11,5,3,3,5,3,11,5,3,7]