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A199538 as a simple table

na(n)
11
21
31
42
51
63
72
81
93
104
112
125
131
146
153
167
174
182
195
208
211
229
236
243
257
2610
274
2811
292
3012
315
3213
338
341
359
3614
376
3815
393
4016
417
4217
4310
444
4511
4618
472
4819
4912
505
5113
5220
538
5421
551
5622
579
5823
5914
606
6115
6224
633
6425
6516
667
6717
6826
6910
7027
714
7228
7311
7429
7518
762

[1,1,1,2,1,3,2,1,3,4,2,5,1,6,3,7,4,2,5,8,1,9,6,3,
 7,10,4,11,2,12,5,13,8,1,9,14,6,15,3,16,7,17,10,4,
 11,18,2,19,12,5,13,20,8,21,1,22,9,23,14,6,15,24,3,
 25,16,7,17,26,10,27,4,28,11,29,18,2]