Composite numbers not ending in zero that yield a prime when turned upside down.

Terms

a(0) =68a(1) =116a(2) =118a(3) =161a(4) =166a(5) =169a(6) =188a(7) =608a(8) =616a(9) =1006a(10) =1018a(11) =1066a(12) =1081a(13) =1096a(14) =1106a(15) =1108a(16) =1118a(17) =1169a(18) =1186a(19) =1606a(20) =1618a(21) =1808a(22) =1816a(23) =1898a(24) =1916a(25) =1918a(26) =1969a(27) =1981a(28) =1988a(29) =1996