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A321201 as a simple table

na(n)
21
30
40
51
62
70
81
91
100
112
123
130
142
151
161
172
184
190
200
213
223
231
242
252
265
270
281
293
304
311
320
334
343
352
366
370
382
393
405
411
421
434
444
452
467
470
480
495
503
513
526
531
542
554
565
572
588
590
601
615
624
633
647
651
660
676
683
694
706
712
729
730
742
755
765
773
788
791
801
816
824
834
847
852
8610
870

[1,0,0,1,2,0,1,1,0,2,3,0,2,1,1,2,4,0,0,3,3,1,2,2,
 5,0,1,3,4,1,0,4,3,2,6,0,2,3,5,1,1,4,4,2,7,0,0,5,3,
 3,6,1,2,4,5,2,8,0,1,5,4,3,7,1,0,6,3,4,6,2,9,0,2,5,
 5,3,8,1,1,6,4,4,7,2,10,0]