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A256394 as a simple table

na(n)
12
23
311
467
571
6439
71051
86469
940087
10100361
11100363
12251737
13251761
14637319
15637327
164124459
1710553513
1810553551
1927067277
2069709733
21179993171
22465769817
233140421769
248179002109
258179002133
2655762149029
2755762149071
28382465573489
291003652347081

[2,3,11,67,71,439,1051,6469,40087,100361,100363,
 251737,251761,637319,637327,4124459,10553513,
 10553551,27067277,69709733,179993171,465769817,
 3140421769,8179002109,8179002133,55762149029,
 55762149071,382465573489,1003652347081]