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A240693 as a simple table

na(n)
15
217
353
4137
5229
6389
7467
8619
9709
10787
111091
121103
131213
141249
151433
161459
171601
181993
192029
202039
212087
222089
232393
242687
253217
263299
273529
283547
293691
303793
314019
324091
334099
344231
354507
364561
374679
385351
395399
405471
415521
425581
435669
445783
455813
465861
475939
486247
496841
506899
516961

[5,17,53,137,229,389,467,619,709,787,1091,1103,
 1213,1249,1433,1459,1601,1993,2029,2039,2087,2089,
 2393,2687,3217,3299,3529,3547,3691,3793,4019,4091,
 4099,4231,4507,4561,4679,5351,5399,5471,5521,5581,
 5669,5783,5813,5861,5939,6247,6841,6899,6961]