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A080521 as a simple table

na(n)
12
21
33
41
52
65
71
82
93
1010
111
122
133
144
1522
161
172
183
194
205
2149
221
232
243
254
265
276
28107
291
302
313
324
335
346
357
36228
371
382
393
404
415
426
437
448
45476
461
472
483
494
505
516
527
538
549
55979
561
572
583
594
605
616
627
638
649
6510
661993
671
682
693
704
715
726
737
748
759
7610
7711
784030

[2,1,3,1,2,5,1,2,3,10,1,2,3,4,22,1,2,3,4,5,49,1,2,
 3,4,5,6,107,1,2,3,4,5,6,7,228,1,2,3,4,5,6,7,8,476,
 1,2,3,4,5,6,7,8,9,979,1,2,3,4,5,6,7,8,9,10,1993,1,
 2,3,4,5,6,7,8,9,10,11,4030]