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A331671 as a simple table

na(n)
10
20
30
40
50
60
71
80
90
100
110
120
130
141
150
160
171
180
190
200
211
220
231
240
250
260
270
281
290
300
311
320
330
341
351
360
370
380
390
400
411
421
430
440
450
461
471
480
492
500
511
520
530
540
550
561
570
580
590
600
610
621
631
640
650
660
670
681
691
701
711
720
731
740
750
760
771
780
791
800
810
821
830
841
851
860
870
880
891
900
911
921
931
941
950
960
971
982
990
1000
1010
1021

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