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A156731 as a simple table

na(n)
10
20
31
40
51
60
70
80
90
101
110
121
130
140
151
160
171
180
190
200
211
220
231
240
251
260
270
280
290
301
310
321
330
340
350
361
370
381
390
400
411
420
430
441
450
460
470
481
490
500
511
520
531
540
550
560
571
580
591
600
610
620
630
641
650
661
670
680
690
700
711
720
731
740
750
761
770
781
790
800
810
821
830
840
851
860
871
880
890
900
911
920
931
940
950
961
970
981
990
1001
1010
1020
1030
1040
1051

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