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A264050 as a simple table

na(n)
13
23
33
43
55
63
73
87
99
107
115
123
1317
1427
153
163
1729
183
1921
207
2117
2215
239
2443
2535
2615
2729
283
2911
303
3111
3215
3317
3425
3553
3631
379
387
3923
4015
4127
4215
4329
447
4559
4615
475
4821
4969
5055
5121
5221
535
54159
553
5681
579
5869
59131
6033
6115
62135
6329
6413
65131
669
673
6833
6929
7025
7111
7215
7329
7437
7533

[3,3,3,3,5,3,3,7,9,7,5,3,17,27,3,3,29,3,21,7,17,
 15,9,43,35,15,29,3,11,3,11,15,17,25,53,31,9,7,23,
 15,27,15,29,7,59,15,5,21,69,55,21,21,5,159,3,81,9,
 69,131,33,15,135,29,13,131,9,3,33,29,25,11,15,29,
 37,33]