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A002385 as a simple table

na(n)
12
23
35
47
511
6101
7131
8151
9181
10191
11313
12353
13373
14383
15727
16757
17787
18797
19919
20929
2110301
2210501
2310601
2411311
2511411
2612421
2712721
2812821
2913331
3013831
3113931
3214341
3314741
3415451
3515551
3616061
3716361
3816561
3916661
4017471
4117971
4218181

[2,3,5,7,11,101,131,151,181,191,313,353,373,383,
 727,757,787,797,919,929,10301,10501,10601,11311,
 11411,12421,12721,12821,13331,13831,13931,14341,
 14741,15451,15551,16061,16361,16561,16661,17471,
 17971,18181]