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A317991 as a simple table

na(n)
20
30
41
50
60
71
81
91
100
111
120
131
140
151
160
171
181
192
200
211
221
230
241
251
261
271
280
291
301
310
320
331
342
350
360
372
381
391
401
411
420
432
441
451
460
471
482
490
501
512
522
531
540
551
560
571
581
591
600
610
621
632
641
651
661
671
682
691
700
711
720
731
741
750
761
771
781
790
802
811
821
830
842
850
862
870
881

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