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A001899 as a simple table

na(n)
00
10
20
30
41
50
60
70
81
91
100
110
121
130
141
150
161
170
181
191
201
210
220
230
242
250
260
271
282
291
300
310
321
330
341
350
362
370
381
391
401
410
421
430
442
451
460
470
482
491
500
510
521
530
542
550
562
571
581
591
601
610
620
631
642
650
660
670
682
691
701
710
723
730
741
750
762
770
781
791
801
811
820
830
843
850
860

[0,0,0,0,1,0,0,0,1,1,0,0,1,0,1,0,1,0,1,1,1,0,0,0,
 2,0,0,1,2,1,0,0,1,0,1,0,2,0,1,1,1,0,1,0,2,1,0,0,2,
 1,0,0,1,0,2,0,2,1,1,1,1,0,0,1,2,0,0,0,2,1,1,0,3,0,
 1,0,2,0,1,1,1,1,0,0,3,0,0]