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A252168 as a simple table

na(n)
12
23
31
41
51
62
71
81
92
101
111
122
131
142
154
161
171
182
193
201
212
221
231
242
251
262
274
281
292
304
311
321
332
343
351
362
371
381
392
403
411
422
431
442
454
461
472
484
493
501
512
521
531
542
551
561
572
581
592
604
613
624
634
6447
651
662
671
682
696
701
711
722
733
743
758
761
771
782
793
801
812
825
831
842
851
862
874

[2,3,1,1,1,2,1,1,2,1,1,2,1,2,4,1,1,2,3,1,2,1,1,2,
 1,2,4,1,2,4,1,1,2,3,1,2,1,1,2,3,1,2,1,2,4,1,2,4,3,
 1,2,1,1,2,1,1,2,1,2,4,3,4,4,47,1,2,1,2,6,1,1,2,3,
 3,8,1,1,2,3,1,2,5,1,2,1,2,4]