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

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =101a(6) =313a(7) =727a(8) =757a(9) =919a(10) =929a(11) =31013a(12) =72227a(13) =73037a(14) =73237a(15) =74047a(16) =75557a(17) =76367a(18) =76667a(19) =77377a(20) =77477a(21) =91019a(22) =93139a(23) =93239a(24) =94049a(25) =94349a(26) =96269a(27) =96469a(28) =97379a(29) =97579