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A272907 as a simple table

na(n)
11
21
31
41
52
61
72
83
91
102
113
121
132
143
151
164
172
183
191
204
212
223
235
241
254
262
273
285
291
304
312
323
335
341
356
364
372
383
395
401
416
424
432
443
455
467
471
486
494
502
513
525
537
541
556
564
572
583
595
607
611
628
636
644
652
663
675
687
691
708
716
724
732
743
755
767
779
781
798
806
814
822
833
845
857
869

[1,1,1,1,2,1,2,3,1,2,3,1,2,3,1,4,2,3,1,4,2,3,5,1,
 4,2,3,5,1,4,2,3,5,1,6,4,2,3,5,1,6,4,2,3,5,7,1,6,4,
 2,3,5,7,1,6,4,2,3,5,7,1,8,6,4,2,3,5,7,1,8,6,4,2,3,
 5,7,9,1,8,6,4,2,3,5,7,9]