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A051067 as a simple table

na(n)
00
11
21
31
40
50
60
71
81
90
100
111
120
130
141
150
160
171
181
190
200
210
221
231
241
250
260
270
281
291
301
310
320
330
341
351
360
370
381
390
400
411
420
430
441
451
460
470
480
491
501
511
520
530
540
551
561
571
580
590
600
611
621
630
640
651
660
670
681
690
700
711
721
730
740
750
761
771
781
790
800
811
821
830
841
851
860
871
881
890
900
911
921
931
940
950
960
971
981
990
1000
1011
1020
1030
1041

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