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A281939 as a simple table

na(n)
01
12
23
32
41
52
62
72
82
93
105
112
121
134
143
153
163
173
186
191
201
214
221
232
242
253
267
275
283
293
303
314
323
334
348
353
362
374
383
394
405
417
4210
432
441
457
461
472
485
492
507
514
523
534
542
553
563
573
587
594
604
613
623
636
641
655
6612
674
681
694
704
713
724
735
748
754
763
774
784
793
805

[1,2,3,2,1,2,2,2,2,3,5,2,1,4,3,3,3,3,6,1,1,4,1,2,
 2,3,7,5,3,3,3,4,3,4,8,3,2,4,3,4,5,7,10,2,1,7,1,2,
 5,2,7,4,3,4,2,3,3,3,7,4,4,3,3,6,1,5,12,4,1,4,4,3,
 4,5,8,4,3,4,4,3,5]