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A338030 as a simple table

na(n)
17
217
337
471
573
6167
7181
8191
9353
10373
11389
12761
13787
14797
15929
16983
171753
181879
193571
207057
217177
227507
237717
247879
259349
269439
279781
289787
2915053
3015227
3115307
3215451
3315551
3415667
3515679
3615791
3715919
3816061
3916073
4016453
4116547
4216561
4316747
4416883
4516979
4617471
4717909
4817971
4918427

[7,17,37,71,73,167,181,191,353,373,389,761,787,
 797,929,983,1753,1879,3571,7057,7177,7507,7717,
 7879,9349,9439,9781,9787,15053,15227,15307,15451,
 15551,15667,15679,15791,15919,16061,16073,16453,
 16547,16561,16747,16883,16979,17471,17909,17971,
 18427]