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A118725 as a simple table

na(n)
12
23
35
47
511
613
717
831
971
10101
11107
12113
13131
14149
15157
16167
17179
18181
19191
20199
21311
22347
23353
24359
25389
26701
27743
28751
29761
30787
31797
32919
33941
34953
35971
36983
37991
381009
391031
401061
411091
421097
431109
441151
451217
461229
471259
481283
491301
501409
511439

[2,3,5,7,11,13,17,31,71,101,107,113,131,149,157,
 167,179,181,191,199,311,347,353,359,389,701,743,
 751,761,787,797,919,941,953,971,983,991,1009,1031,
 1061,1091,1097,1109,1151,1217,1229,1259,1283,1301,
 1409,1439]