Primes in A173299.

Terms

a(0) =2a(1) =5a(2) =7a(3) =19a(4) =13a(5) =71a(6) =97a(7) =181a(8) =3691a(9) =2521a(10) =191861a(11) =489061a(12) =6811741a(13) =138907099a(14) =708158977a(15) =1321442641a(16) =26947261171a(17) =18405321661