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A278104 as a simple table

na(n)
11
22
31
43
52
61
74
82
95
103
112
126
134
143
152
167
174
188
195
204
213
229
236
2410
257
265
2711
287
2912
308
316
3213
339
347
355
3614
379
3815
3910
408
416
4216
4311
4417
4512
469
4718
4812
4919
5013
5110
5220
5314
5411
558
5621
5714
5822
5915
6012
619
628
6323
6416
6513
6610
679
688
6924
7016
7113
7210
739
7425
7517
7626
7718
7827
7919
8015
8128
8219

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