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A160727 as a simple table

na(n)
12
23
37
43
59
69
723
83
99
109
1127
129
1327
1427
1573
163
179
189
1927
209
2127
2227
2381
249
2527
2627
2781
2827
2981
3081
31227
323
339
349
3527
369
3727
3827
3981
409
4127
4227
4381
4427
4581
4681
47243
489
4927
5027
5181
5227
5381
5481
55243
5627
5781
5881
59243
6081
61243
62243
63697
643
659
669
6727
689

[2,3,7,3,9,9,23,3,9,9,27,9,27,27,73,3,9,9,27,9,27,
 27,81,9,27,27,81,27,81,81,227,3,9,9,27,9,27,27,81,
 9,27,27,81,27,81,81,243,9,27,27,81,27,81,81,243,
 27,81,81,243,81,243,243,697,3,9,9,27,9]