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A247202 as a simple table

na(n)
13
23
33
43
57
63
73
85
97
105
113
125
139
145
159
1617
177
183
1951
2017
217
2233
2313
2439
2557
2611
2721
2827
297
30213
3115
325
3331
343
3525
3617
3721
383
3925
40107
4115
4233
433
4435
457
4623
4731
485
4919
5011
5121
5265
53147
545
553
5633
5751
5877
5945
6017
6169
6253
639
643
6567
6663
6743
6863
6951
7027
7173
725

[3,3,3,3,7,3,3,5,7,5,3,5,9,5,9,17,7,3,51,17,7,33,
 13,39,57,11,21,27,7,213,15,5,31,3,25,17,21,3,25,
 107,15,33,3,35,7,23,31,5,19,11,21,65,147,5,3,33,
 51,77,45,17,69,53,9,3,67,63,43,63,51,27,73,5]