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A253574 as a simple table

na(n)
12
23
37
453
559
667
789
8383
9887
102027
113253
125669
137993
148009
159059
1653633
1754667
1856533
1988883
20272777777
21299222299
22383833883
23797769997

[2,3,7,53,59,67,89,383,887,2027,3253,5669,7993,
 8009,9059,53633,54667,56533,88883,272777777,
 299222299,383833883,797769997]