Emirps which remain primes when rotated by 180 degrees on a digital clock display.

Terms

a(0) =199a(1) =1061a(2) =1091a(3) =1109a(4) =1181a(5) =1601a(6) =1669a(7) =1811a(8) =1901a(9) =10061a(10) =10069a(11) =10091a(12) =10909a(13) =11909a(14) =16001a(15) =18691a(16) =18911a(17) =19001a(18) =19661a(19) =19801a(20) =101119a(21) =101611a(22) =106681a(23) =106699a(24) =106861a(25) =108881a(26) =109609a(27) =109891a(28) =110119a(29) =110881