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A289438 as a simple table

na(n)
20
31
40
51
62
72
81
93
102
113
124
133
144
155
163
174
186
195
204
217
226
236
248
256
266
279
288
297
3010
318
327
3311
348
3510
3612
379
3810
3913
409
4110
4214
4311
4412
4515
4612
4712
4816
4914
5012
5117
5212
5313
5418
5515
5616
5719
5814
5915
6020
6115
6216
6321
6415
6516
6622
6717
6816
6923
7020

[0,1,0,1,2,2,1,3,2,3,4,3,4,5,3,4,6,5,4,7,6,6,8,6,
 6,9,8,7,10,8,7,11,8,10,12,9,10,13,9,10,14,11,12,
 15,12,12,16,14,12,17,12,13,18,15,16,19,14,15,20,
 15,16,21,15,16,22,17,16,23,20]