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A226081 as a simple table

na(n)
11
22
33
41
54
61
73
85
91
104
115
122
136
141
155
167
173
187
192
205
217
221
236
249
254
2610
273
287
299
302
317
328
333
348
351
367
3711
385
3913
404
419
4213
433
4410
4511
464
4711
482
499
5012
515
5211
533
548
559
561
578
5813
596
6016
615
6211
6317
644
6513
6614
675
6816
693
7013
7117
727
7315
744
7511
7613
772
7811
7916

[1,2,3,1,4,1,3,5,1,4,5,2,6,1,5,7,3,7,2,5,7,1,6,9,
 4,10,3,7,9,2,7,8,3,8,1,7,11,5,13,4,9,13,3,10,11,4,
 11,2,9,12,5,11,3,8,9,1,8,13,6,16,5,11,17,4,13,14,
 5,16,3,13,17,7,15,4,11,13,2,11,16]