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A138261 as a simple table

na(n)
11
21
310
41
53
610
77
81
911
103
1121
1211
139
149
1513
162
173
1811
1913
209
2111
2221
2315
2411
2521
269
2713
289
2910
3013
3111
322
3321
343
359
3611
3713
3813
3917
409
4121
4211
4310
4421
4513
4615
4792
4855
4929
5021
5120
529
5358
5413
5521
569
5713
5810
5922
6013
6121
6211
6311
644
659
6621
6723
689
6967
709
7146
7211
7313
7413
7521
7613
7731
7817

[1,1,10,1,3,10,7,1,11,3,21,11,9,9,13,2,3,11,13,9,
 11,21,15,11,21,9,13,9,10,13,11,2,21,3,9,11,13,13,
 17,9,21,11,10,21,13,15,92,55,29,21,20,9,58,13,21,
 9,13,10,22,13,21,11,11,4,9,21,23,9,67,9,46,11,13,
 13,21,13,31,17]