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A339096 as a simple table

na(n)
15
27
311
423
5701
63989
74397
85501
97309
109281
1110331
1211243
1312907
1416127
1527917
1639901
1743051
1844843
1948397
2066569
2170657

[5,7,11,23,701,3989,4397,5501,7309,9281,10331,
 11243,12907,16127,27917,39901,43051,44843,48397,
 66569,70657]