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A277731 as a simple table

na(n)
10
21
30
41
52
60
71
80
91
102
110
120
131
140
151
162
170
181
190
201
212
220
230
241
250
261
270
281
292
300
311
320
331
342
350
360
371
380
391
402
410
421
430
441
452
460
470
481
490
501
510
521
532
540
551
560
571
582
590
601
610
621
632
640
650
661
670
681
692
700
711
720
731
742
750
760
771
780
791
800
811
822
830
841
850
861
872
880
890
901
910
921
932

[0,1,0,1,2,0,1,0,1,2,0,0,1,0,1,2,0,1,0,1,2,0,0,1,
 0,1,0,1,2,0,1,0,1,2,0,0,1,0,1,2,0,1,0,1,2,0,0,1,0,
 1,0,1,2,0,1,0,1,2,0,1,0,1,2,0,0,1,0,1,2,0,1,0,1,2,
 0,0,1,0,1,0,1,2,0,1,0,1,2,0,0,1,0,1,2]