Primes which are the concatenation of two primes in exactly three ways.

Terms

a(0) =3137a(1) =3797a(2) =13997a(3) =19937a(4) =19997a(5) =23911a(6) =23929a(7) =29173a(8) =29311a(9) =31193a(10) =37337a(11) =37397a(12) =43397a(13) =59929a(14) =73331a(15) =78737a(16) =79337a(17) =103997a(18) =109397a(19) =127997a(20) =139967a(21) =173347a(22) =173359a(23) =193337a(24) =193373a(25) =193877a(26) =199337a(27) =199373a(28) =199967a(29) =229373