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A351468 as a simple table

na(n)
21
32
41
52
61
72
83
91
102
111
123
131
142
153
164
171
182
193
201
214
222
231
243
251
262
273
284
295
301
312
323
334
341
355
362
373
381
394
405
412
421
433
441
452
463
474
485
496
501
512
523
534
545
551
566
572
583
594
601
615
626
632
643
651
664
675
686
692
701
713

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