Numbers k such that k prefixed by '8' and followed by '9' is prime.

Terms

a(0) =0a(1) =2a(2) =3a(3) =5a(4) =17a(5) =20a(6) =21a(7) =26a(8) =32a(9) =36a(10) =38a(11) =41a(12) =42a(13) =53a(14) =59a(15) =60a(16) =62a(17) =66a(18) =68a(19) =69a(20) =71a(21) =77a(22) =81a(23) =83a(24) =84a(25) =92a(26) =96a(27) =99a(28) =101a(29) =104