Primes which are the decimal concatenation of 1, a prime, and 1.

Terms

a(0) =131a(1) =151a(2) =1171a(3) =1231a(4) =1291a(5) =1471a(6) =1531a(7) =1831a(8) =11071a(9) =11131a(10) =11311a(11) =11491a(12) =11731a(13) =11971a(14) =12391a(15) =12511a(16) =13171a(17) =13591a(18) =13831a(19) =14011a(20) =14431a(21) =15031a(22) =15091a(23) =15991a(24) =16411a(25) =16831a(26) =17011a(27) =17191a(28) =17431a(29) =17971