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A086321 as a simple table

na(n)
12
27
317
437
547
697
7107
8227
9277
10577
11587
12647
131367
141657
151667
163457
173467
183517
193527
203877
2110007
2220747
2320807
2421107
2521157
2660037
27124477
28124847

[2,7,17,37,47,97,107,227,277,577,587,647,1367,
 1657,1667,3457,3467,3517,3527,3877,10007,20747,
 20807,21107,21157,60037,124477,124847]