Right-truncatable primes: every prefix is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =23a(5) =29a(6) =31a(7) =37a(8) =53a(9) =59a(10) =71a(11) =73a(12) =79a(13) =233a(14) =239a(15) =293a(16) =311a(17) =313a(18) =317a(19) =373a(20) =379a(21) =593a(22) =599a(23) =719a(24) =733a(25) =739a(26) =797a(27) =2333a(28) =2339a(29) =2393