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A257658 as a simple table

na(n)
12
23
35
47
511
613
717
819
923
1029
1131
1259
1361
1489
15149
16151
17179
18181
19211
20419
21421
22631
23839
241049
251051
261259
271471
281889
292099
302309
312311
324621
339239
349241
3511549
3611551
3713859
3818481
3920789
4023099
4125409
4225411
4330029
4490089
45120121
46150151
47180179
48180181

[2,3,5,7,11,13,17,19,23,29,31,59,61,89,149,151,
 179,181,211,419,421,631,839,1049,1051,1259,1471,
 1889,2099,2309,2311,4621,9239,9241,11549,11551,
 13859,18481,20789,23099,25409,25411,30029,90089,
 120121,150151,180179,180181]