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A081221 as a simple table

na(n)
10
20
30
41
50
60
70
82
91
100
110
121
130
140
150
161
170
181
190
201
210
220
230
242
251
260
272
281
290
300
310
321
330
340
350
361
370
380
390
401
410
420
430
442
451
460
470
483
492
501
510
521
530
541
550
561
570
580
590
601
610
620
632
641
650
660
670
681
690
700
710
721
730
740
752
761
770
780
790
802
811
820
830
841
850
860
870
881
890
901
910
921
930
940
950
961
970
983
992
1001
1010
1020
1030
1041
1050

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