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A228668 as a simple table

na(n)
12
21
31
43
52
62
75
81
91
106
112
122
137
142
154
168
172
182
1910
201
211
2211
232
242
2512
262
272
2813
293
305
3114
322
334
3415
352
362
3717
381
391
4018
412
422
4319
444
456
4620
472
482
4921
504
516
5222
534
546
5523
562
574
5824
592
602
6126
621
631
6427
652
662
6728
684
694
7029
718
725
7330
742
752
7631
776
788
7932

[2,1,1,3,2,2,5,1,1,6,2,2,7,2,4,8,2,2,10,1,1,11,2,
 2,12,2,2,13,3,5,14,2,4,15,2,2,17,1,1,18,2,2,19,4,
 6,20,2,2,21,4,6,22,4,6,23,2,4,24,2,2,26,1,1,27,2,
 2,28,4,4,29,8,5,30,2,2,31,6,8,32]