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A091970 as a simple table

na(n)
10
20
31
40
50
61
71
81
91
102
110
120
131
140
150
161
171
181
191
202
211
220
230
241
250
260
271
281
291
301
312
320
330
341
350
360
371
381
391
401
412
421
431
441
451
462
471
481
491
501
512
521
531
541
551
562
572
581
590
600
611
620
630
641
651
661
671
682
690
700
711
720
730
741
751
761
771
782
791
800
810
821
830
840
851
861
871
881
892
900
910
921
930
940
951
961
971
981
992

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