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A127795 as a simple table

na(n)
01
13
23
39
43
53
63
717
843
929
103
1117
1231
1323
1415
1559
1621
1721
18159
199
2033
2129
229
2329
2415
2533
267
2717
283
2939
30133
31105
3261
33255
34267
3539
3633
3751
3843
3929
40451
41165
427
4317
4467
4533
4687
475
48175
4951
50147
5195
5245
53299
5419
55141
5687
57129
587
5975
6015
61215
62205
6335
64133
6535
6615
67351
687
69203

[1,3,3,9,3,3,3,17,43,29,3,17,31,23,15,59,21,21,
 159,9,33,29,9,29,15,33,7,17,3,39,133,105,61,255,
 267,39,33,51,43,29,451,165,7,17,67,33,87,5,175,51,
 147,95,45,299,19,141,87,129,7,75,15,215,205,35,
 133,35,15,351,7,203]