Primes that yield a different prime when rotated by 180 degrees.

Terms

a(0) =19a(1) =61a(2) =109a(3) =199a(4) =601a(5) =661a(6) =1019a(7) =1061a(8) =1091a(9) =1109a(10) =1181a(11) =1601a(12) =1609a(13) =1669a(14) =1699a(15) =1811a(16) =1901a(17) =1999a(18) =6011a(19) =6091a(20) =6101a(21) =6199a(22) =6619a(23) =6661a(24) =6689a(25) =6691a(26) =6899a(27) =6991a(28) =10061a(29) =10069