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A309375 as a simple table

na(n)
12
25
311
4101
5131
6181
7191
8313
9353
10373
11383
12757
13797
14919
15929
1610301
1710601
1811311
1911411
2012421
2112721
2212821
2313331
2413931
2514341
2614741
2715451
2815551
2916061
3016361
3116561
3216661
3317471
3417971
3518481
3619391
3719891
3819991
3930203
4030403
4130703
4230803

[2,5,11,101,131,181,191,313,353,373,383,757,797,
 919,929,10301,10601,11311,11411,12421,12721,12821,
 13331,13931,14341,14741,15451,15551,16061,16361,
 16561,16661,17471,17971,18481,19391,19891,19991,
 30203,30403,30703,30803]