Primes with seven embedded primes.

Terms

a(0) =1373a(1) =3137a(2) =3797a(3) =5237a(4) =6173a(5) =11173a(6) =11311a(7) =11353a(8) =11719a(9) =11731a(10) =11971a(11) =12113a(12) =12239a(13) =12347a(14) =12377a(15) =12953a(16) =12973a(17) =13127a(18) =13177a(19) =13217a(20) =13537a(21) =13597a(22) =13679a(23) =13709a(24) =13711a(25) =13723a(26) =13729a(27) =13751a(28) =13757a(29) =13759