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A217371 as a simple table

na(n)
13
27
319
45
511
617
75
813
931
105
1111
1253
137
1423
1531
167
1719
1843
195
2017
2183
225
237
2411
2523
267
2723
2879
295
307
3111
3247
335
3441
35101
3611
3723
3883
3911
4031
4167
425
4311
4413
4541
465
477
4817
4953
5011
5159
5271
537
5411
5523
5629
5719
5829
59109
6011
6123
62251
6311
6441
65149
665
677
6811
69191
7023
7147
7271

[3,7,19,5,11,17,5,13,31,5,11,53,7,23,31,7,19,43,5,
 17,83,5,7,11,23,7,23,79,5,7,11,47,5,41,101,11,23,
 83,11,31,67,5,11,13,41,5,7,17,53,11,59,71,7,11,23,
 29,19,29,109,11,23,251,11,41,149,5,7,11,191,23,47,
 71]