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A139320 as a simple table

na(n)
12
21
31
41
54
61
72
81
92
103
114
121
138
143
154
162
174
183
192
204
214
225
236
241
256
267
274
285
296
303
312
324
334
343
3510
362
372
383
396
405
414
424
436
446
454
465
476
481
492
509
5110
526
534
545
558
564
574
586
596
604
618
627
634
643
656
663
676
684
6912
706
714
725
7314
746
758
762
774
786
792
806
818
825
834
846
8512
867
876
8811
8916

[2,1,1,1,4,1,2,1,2,3,4,1,8,3,4,2,4,3,2,4,4,5,6,1,
 6,7,4,5,6,3,2,4,4,3,10,2,2,3,6,5,4,4,6,6,4,5,6,1,
 2,9,10,6,4,5,8,4,4,6,6,4,8,7,4,3,6,3,6,4,12,6,4,5,
 14,6,8,2,4,6,2,6,8,5,4,6,12,7,6,11,16]