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A080607 as a simple table

na(n)
13
23
33
46
56
66
79
89
99
1012
1112
1212
1312
1412
1512
1615
1715
1815
1915
2015
2115
2218
2318
2418
2518
2618
2718
2821
2921
3021
3121
3221
3321
3421
3521
3621
3724
3824
3924
4024
4124
4224
4324
4424
4524
4627
4727
4827
4927
5027
5127
5227
5327
5427
5530
5630
5730
5830
5930
6030
6130
6230
6330
6430
6530
6630
6733
6833
6933
7033
7133
7233

[3,3,3,6,6,6,9,9,9,12,12,12,12,12,12,15,15,15,15,
 15,15,18,18,18,18,18,18,21,21,21,21,21,21,21,21,
 21,24,24,24,24,24,24,24,24,24,27,27,27,27,27,27,
 27,27,27,30,30,30,30,30,30,30,30,30,30,30,30,33,
 33,33,33,33,33]