Primes whose consecutive digits differ by 7 or 8.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =19a(5) =29a(6) =181a(7) =191a(8) =919a(9) =929a(10) =8081a(11) =8191a(12) =9181a(13) =18181a(14) =18191a(15) =19181a(16) =29191a(17) =80819a(18) =81919a(19) =81929a(20) =91807a(21) =181919a(22) =191929a(23) =808081a(24) =1918181a(25) =8070707a(26) =8081929a(27) =8191819a(28) =9192929a(29) =18080807