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A117272 as a simple table

na(n)
13
25
311
419
547
661
771
897
9157
10179
11229
12373
13409
14691
151231
161373
171987
182213
192557
203119
213989
228443
239311
2417191
2520707
2626261
2738281
2841381
2948611
3054541
3166889
3274257
33255709

[3,5,11,19,47,61,71,97,157,179,229,373,409,691,
 1231,1373,1987,2213,2557,3119,3989,8443,9311,
 17191,20707,26261,38281,41381,48611,54541,66889,
 74257,255709]