Palindromic primes whose digital root equals their middle digits.

Terms

a(0) =919a(1) =929a(2) =18181a(3) =18481a(4) =36263a(5) =36563a(6) =72227a(7) =72727a(8) =90709a(9) =1082801a(10) =1085801a(11) =1175711a(12) =1177711a(13) =1178711a(14) =1262621a(15) =1268621a(16) =1444441a(17) =1447441a(18) =1532351a(19) =1535351a(20) =1628261a(21) =1712171a(22) =1714171a(23) =1802081a(24) =1805081a(25) =1895981a(26) =1981891