Echo primes: primes p such that the greatest prime factor of p-1 is a suffix of p.

Terms

a(0) =13a(1) =73a(2) =127a(3) =163a(4) =193a(5) =197a(6) =313a(7) =337a(8) =419a(9) =433a(10) =757a(11) =929a(12) =1153a(13) =2017a(14) =2311a(15) =2593a(16) =2647a(17) =3137a(18) =3659a(19) =4483a(20) =4673a(21) =5741a(22) =6857a(23) =7057a(24) =12071a(25) =12097a(26) =13267a(27) =13313a(28) =13619a(29) =14407