Primes that become semiprimes when turned upside down.

Terms

a(0) =191a(1) =691a(2) =811a(3) =991a(4) =1009a(5) =1069a(6) =1619a(7) =1801a(8) =1861a(9) =1889a(10) =6089a(11) =6869a(12) =6911a(13) =6961a(14) =8101a(15) =8191a(16) =8609a(17) =8669a(18) =8689a(19) =9001a(20) =9811a(21) =10009a(22) =10099a(23) =10111a(24) =10169a(25) =10181a(26) =10601a(27) =10889a(28) =10891a(29) =11119