a(n) = smallest prime q > a(n-1) such that 2*prime(n)*q^prime(n)+1 is also prime.

Terms

a(0) =2a(1) =3a(2) =7a(3) =17a(4) =1579a(5) =1997a(6) =2347a(7) =3323a(8) =6637a(9) =11161a(10) =13829a(11) =18287a(12) =40759a(13) =42197a(14) =42337a(15) =45757a(16) =46141a(17) =48383a(18) =49253a(19) =51631a(20) =52541a(21) =53549a(22) =73477a(23) =78079a(24) =81677a(25) =111439a(26) =164363a(27) =166567a(28) =170441a(29) =180667