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A209279 as a simple table

na(n)
11
21
32
42
51
63
72
83
91
104
113
122
134
141
155
163
174
182
195
201
216
224
233
245
252
266
271
287
294
305
313
326
332
347
351
368
375
384
396
403
417
422
438
441
459
465
476
484
497
503
518
522
539
541
5510
566
575
587
594
608
613
629
632
6410
651
6611
676
687
695
708
714
729
733
7410
752
7611
771
7812
797
806
818
825
839
844
8510
863
8711
882
8912
901
9113

[1,1,2,2,1,3,2,3,1,4,3,2,4,1,5,3,4,2,5,1,6,4,3,5,
 2,6,1,7,4,5,3,6,2,7,1,8,5,4,6,3,7,2,8,1,9,5,6,4,7,
 3,8,2,9,1,10,6,5,7,4,8,3,9,2,10,1,11,6,7,5,8,4,9,
 3,10,2,11,1,12,7,6,8,5,9,4,10,3,11,2,12,1,13]