Primes that are concatenations of n with n + 7.

Terms

a(0) =29a(1) =613a(2) =2027a(3) =2633a(4) =3037a(5) =3643a(6) =4451a(7) =6067a(8) =6269a(9) =6673a(10) =7481a(11) =8087a(12) =8693a(13) =10041011a(14) =10341041a(15) =10461053a(16) =10861093a(17) =10941101a(18) =11041111a(19) =11361143a(20) =11421149a(21) =11941201a(22) =12001207a(23) =12061213a(24) =12141221a(25) =12241231a(26) =12501257