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A137075 as a simple table

na(n)
12
23
37
427
5223
6473
74943
849777
9222327
10273393
11477277
12499423
13499473
14973393
152733943
164932923
174993443
184994777
194997927
2049342927
2149924277
2249972927
2349993443
2449994223
2549994777
2697339223
27492942927
28494342927
29497332327
30497794473
31497993923
32499293443
33499932923
34499947327
35499972927
36499979277
37499979327

[2,3,7,27,223,473,4943,49777,222327,273393,477277,
 499423,499473,973393,2733943,4932923,4993443,
 4994777,4997927,49342927,49924277,49972927,
 49993443,49994223,49994777,97339223,492942927,
 494342927,497332327,497794473,497993923,499293443,
 499932923,499947327,499972927,499979277,499979327]