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A337216 as a simple table

na(n)
12
21
33
41
53
62
71
82
94
106
111
123
135
144
153
163
171
181
194
202
216
227
231
243
255
264
278
282
291
303
317
329
335
343
352
364
371
388
399
407
4110
422
436
442
4510
466
473
481
497
505
5111
523
536
543
559
5612
573
586
599
6015
612
621
635
644
658
667
6711
6810
6914
706
713
721
737
749
751
7611
7713
783
799
801
818
823
836
844
855
862
8712
8815
8913
907
9111
9217

[2,1,3,1,3,2,1,2,4,6,1,3,5,4,3,3,1,1,4,2,6,7,1,3,
 5,4,8,2,1,3,7,9,5,3,2,4,1,8,9,7,10,2,6,2,10,6,3,1,
 7,5,11,3,6,3,9,12,3,6,9,15,2,1,5,4,8,7,11,10,14,6,
 3,1,7,9,1,11,13,3,9,1,8,3,6,4,5,2,12,15,13,7,11,
 17]