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A163870 as a simple table

na(n)
12
22
33
42
54
63
72
85
92
103
114
126
132
147
153
165
172
184
198
202
213
226
239
242
254
265
2710
283
297
302
3111
322
333
344
356
368
3712
385
392
4013
413
429
432
444
457
4614
472
483
495
506
5110
5215
532
544
558
5616
573
5811
592
6017
615
627
632
643
654
666
679
6812
6918
702
7119
723
7313
742
754
765
778
7810
7920
802
813
826
837
8414
8521
862
874
8811
8922
903
915
929
9315
942
9523

[2,2,3,2,4,3,2,5,2,3,4,6,2,7,3,5,2,4,8,2,3,6,9,2,
 4,5,10,3,7,2,11,2,3,4,6,8,12,5,2,13,3,9,2,4,7,14,
 2,3,5,6,10,15,2,4,8,16,3,11,2,17,5,7,2,3,4,6,9,12,
 18,2,19,3,13,2,4,5,8,10,20,2,3,6,7,14,21,2,4,11,
 22,3,5,9,15,2,23]