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A249771 as a simple table

na(n)
21
31
41
51
61
71
81
91
101
111
122
131
141
151
161
171
181
191
202
212
221
231
241
253
261
272
281
291
301
311
321
333
343
352
361
371
381
393
402
411
422
432
441
451
461
471
481
491
503
514
523
532
541
551
561
575
582
592
601
613
621
633
643
652
661
671
681
691
703
715
721
732

[1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,2,1,1,1,3,
 1,2,1,1,1,1,1,3,3,2,1,1,1,3,2,1,2,2,1,1,1,1,1,1,3,
 4,3,2,1,1,1,5,2,2,1,3,1,3,3,2,1,1,1,1,3,5,1,2]