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A289697 as a simple table

na(n)
19
211
313
417
523
625
729
831
937
1043
1153
1265
1371
1477
1579
16115
17119
18151
19173
20559
21793
221571
231715
241807
251861
262047
272215
283491
294751
306631
319089
329139
339253
3425811
3529491
3629495
3754335
3854991
3966535
4072365

[9,11,13,17,23,25,29,31,37,43,53,65,71,77,79,115,
 119,151,173,559,793,1571,1715,1807,1861,2047,2215,
 3491,4751,6631,9089,9139,9253,25811,29491,29495,
 54335,54991,66535,72365]