Palindromic primes with nondecreasing digits up to the middle and then nonincreasing.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =131a(6) =151a(7) =181a(8) =191a(9) =353a(10) =373a(11) =383a(12) =787a(13) =797a(14) =11311a(15) =11411a(16) =12421a(17) =12721a(18) =12821a(19) =13331a(20) =13831a(21) =13931a(22) =14741a(23) =15551a(24) =16661a(25) =17971a(26) =19991a(27) =33533a(28) =34543a(29) =34843