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A106880 as a simple table

na(n)
111
229
371
4109
5149
6151
7179
8191
9211
10239
11281
12331
13359
14379
15389
16401
17421
18449
19491
20499
21541
22571
23599
24631
25641
26659
27701
28739
29751
30809
31821
32911
33919
34991
351009
361019
371031
381051
391129
401171
411201
421229
431289
441381
451409
461429
471439
481451

[11,29,71,109,149,151,179,191,211,239,281,331,359,
 379,389,401,421,449,491,499,541,571,599,631,641,
 659,701,739,751,809,821,911,919,991,1009,1019,
 1031,1051,1129,1171,1201,1229,1289,1381,1409,1429,
 1439,1451]