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A169787 as a simple table

na(n)
11
22
33
45
55
65
79
813
99
105
119
1215
1319
1417
1521
1629
1717
185
199
2015
2119
2219
2327
2443
2543
2625
2721
2837
2951
3047
3151
3263
3333
345
359
3615
3719
3819
3927
4043
4143
4227
4327
4447
4567
4671
4775
4899
4991
5041
5121
5237
5351
5455
5571
56111
57127
5887
5959
6087
61125
62119
63119
64133
6565
665
679
6815
6919
7019

[1,2,3,5,5,5,9,13,9,5,9,15,19,17,21,29,17,5,9,15,
 19,19,27,43,43,25,21,37,51,47,51,63,33,5,9,15,19,
 19,27,43,43,27,27,47,67,71,75,99,91,41,21,37,51,
 55,71,111,127,87,59,87,125,119,119,133,65,5,9,15,
 19,19]