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A217831 as a simple table

na(n)
00
11
21
30
41
50
60
71
81
90
100
111
120
131
140
150
161
171
181
191
200
210
221
230
240
250
261
270
280
291
301
311
321
331
341
350
360
371
380
391
400
411
420
431
440
450
461
471
480
491
501
510
521
531
540
550
561
570
581
590
600
610
621
630
641
650
660
671
681
691
701
711
721
731
741
751
761
770
780
791
800
810
820
831
840
851
860
870
880
891
900
910
921
931
941
951

[0,1,1,0,1,0,0,1,1,0,0,1,0,1,0,0,1,1,1,1,0,0,1,0,
 0,0,1,0,0,1,1,1,1,1,1,0,0,1,0,1,0,1,0,1,0,0,1,1,0,
 1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,1,0,0,1,1,1,1,1,1,1,
 1,1,1,0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,1,1,1,1]