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A111296 as a simple table

na(n)
12
25
313
413
531
631
771
873
973
1071
11199
12157
13157
14197
15241
16241
17409
18199
19419
20401
21547
22419
23691
24409
25701
26547
27919
28701
29929
30691
311117
32929
331321
34919
351471
361117
371777
381483
391483
401321
412297
421471
431979
442069
452251
461979
472069
481777
492549
502251

[2,5,13,13,31,31,71,73,73,71,199,157,157,197,241,
 241,409,199,419,401,547,419,691,409,701,547,919,
 701,929,691,1117,929,1321,919,1471,1117,1777,1483,
 1483,1321,2297,1471,1979,2069,2251,1979,2069,1777,
 2549,2251]