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A209281 as a simple table

na(n)
10
21
32
41
53
62
71
82
94
103
112
123
131
142
153
162
175
184
193
204
212
223
234
243
251
262
273
282
294
303
312
323
336
345
354
365
373
384
395
404
412
423
434
443
455
464
473
484
491
502
513
522
534
543
552
563
575
584
593
604
612
623
634
643
657
666
675
686
694
705
716
725
733
744
755
764
776
785
794
805
812
823
834
843
855
864
873

[0,1,2,1,3,2,1,2,4,3,2,3,1,2,3,2,5,4,3,4,2,3,4,3,
 1,2,3,2,4,3,2,3,6,5,4,5,3,4,5,4,2,3,4,3,5,4,3,4,1,
 2,3,2,4,3,2,3,5,4,3,4,2,3,4,3,7,6,5,6,4,5,6,5,3,4,
 5,4,6,5,4,5,2,3,4,3,5,4,3]