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A031226 as a simple table

na(n)
11
21
31
41
52
61
71
81
91
101
111
121
131
142
151
161
171
181
191
201
211
221
232
241
251
261
271
281
291
301
311
322
331
341
351
361
371
381
391
401
413
422
432
442
452
461
471
481
491
501
511
521
531
541
551
561
571
581
591
601
611
621
631
641
651
661
671
681
691
702
711
721
731
741
751
761
771
781
792
801
811
821
831
841

[1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,
 1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,3,2,2,2,2,1,1,1,1,
 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,
 1,1,1,1,2,1,1,1,1,1]