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A064064 as a simple table

na(n)
01
12
23
34
44
55
66
75
86
97
108
115
126
137
148
158
166
177
188
199
209
2110
227
238
249
2510
2610
2711
2812
296
307
318
329
339
3410
3511
3610
377
388
399
4010
4110
4211
4312
4411
4512
468
479
4810
4911
5011
5112
5213
5312
5413
5514
569
5710
5811
5912
6012
6113
6214
6313
6414
6515
6616
676
687
698
709
719
7210
7311
7410
7511
7612
7713
7810
797
808
819
8210
8310

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