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A272728 as a simple table

na(n)
10
21
30
41
52
61
70
81
90
101
112
123
132
141
150
161
172
181
190
201
210
221
230
241
252
263
274
283
292
301
310
321
330
341
352
363
372
381
390
401
412
421
430
441
452
461
470
481
490
501
510
521
530
541
552
563
574
585
594
603
612
621
630
641
652
661
670
681
690
701
710
721
732
743
754
763
772
781
790
801
810
821
832
843
852
861
870
881
890
901
912
923
932
941
950

[0,1,0,1,2,1,0,1,0,1,2,3,2,1,0,1,2,1,0,1,0,1,0,1,
 2,3,4,3,2,1,0,1,0,1,2,3,2,1,0,1,2,1,0,1,2,1,0,1,0,
 1,0,1,0,1,2,3,4,5,4,3,2,1,0,1,2,1,0,1,0,1,0,1,2,3,
 4,3,2,1,0,1,0,1,2,3,2,1,0,1,0,1,2,3,2,1,0]