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A273007 as a simple table

na(n)
15
25
32
45
511
621
721
811
921
1011
1111
1221
136
145
1521
1621
1711
186
1921
2011
2121
2211
2321
2411
2521
2611
27101
2821
2951
30101
31101
3251
33101
3451
3511
3611
3721
38101
39101
40101
4151
4251
4351
445
45101
4611
4751
48101
49101
5051
51101
5251
5326
543
5521
56101
5751
5851
59101
6026
61101
6221
635
6451

[5,5,2,5,11,21,21,11,21,11,11,21,6,5,21,21,11,6,
 21,11,21,11,21,11,21,11,101,21,51,101,101,51,101,
 51,11,11,21,101,101,101,51,51,51,5,101,11,51,101,
 101,51,101,51,26,3,21,101,51,51,101,26,101,21,5,
 51]