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A048848 as a simple table

na(n)
12
22
33
43
57
63
713
87
913
107
1129
127
1337
1413
1519
1619
1753
1813
1961
2019
2137
2229
2379
2419
2571
2637
2761
2837
29107
3019
31113
3253
3371
3453
3589
3637
37151
3861
3989
4053
41173
4237
43181
4471
4589
4679
47199
4853
49181
5071
51131
5289
53239
5461
55173
5689
57151
58107
59271
6053
61281

[2,2,3,3,7,3,13,7,13,7,29,7,37,13,19,19,53,13,61,
 19,37,29,79,19,71,37,61,37,107,19,113,53,71,53,89,
 37,151,61,89,53,173,37,181,71,89,79,199,53,181,71,
 131,89,239,61,173,89,151,107,271,53,281]