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A257646 as a simple table

na(n)
10
22
33
44
54
65
75
89
95
1011
116
1213
136
147
1516
166
1718
187
1920
207
2122
2223
2324
247
2526
2627
279
2829
297
308
3132
3233
3334
348
3510
3637
3738
388
3940
4041
4142
4243
4344
448
4546
4647
4748
4849
499
5051
5152
5253
538
5412
5556
5657
5758
5859
599
6061
6162
6263
6364
649
6513
6667
6768
6869
6970
7071
7172

[0,2,3,4,4,5,5,9,5,11,6,13,6,7,16,6,18,7,20,7,22,
 23,24,7,26,27,9,29,7,8,32,33,34,8,10,37,38,8,40,
 41,42,43,44,8,46,47,48,49,9,51,52,53,8,12,56,57,
 58,59,9,61,62,63,64,9,13,67,68,69,70,71,72]