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A147873 as a simple table

na(n)
10
20
31
40
50
60
70
80
91
100
111
121
131
141
150
161
170
180
190
200
210
220
230
240
251
260
270
280
291
301
310
320
330
340
350
361
371
381
390
401
411
421
430
441
450
460
471
480
491
500
510
520
530
540
551
560
570
580
590
600
610
620
631
640
650
660
670
680
690
701
710
721
731
740
751
760
770
780
791
800
811
820
830
840
850
861
871
881
890
901
911
921
930
940
950
960
971
981
991
1001

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