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A291310 as a simple table

na(n)
20
30
41
51
60
72
82
92
102
112
123
133
144
153
164
174
184
194
205
216
224
235
246
255
266
276
288
296
306
316
328
336
348
3510
369
378
388
399
4010
418
4212
439
4411
4510
4610
4710
4812
4914
5010
5112
5213
5311
5412
5511
5616
5712
5812
5912
6015
6112
6212
6318
6416
6515
6612
6714
6817
6915
7020

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