Palindromic primes with only composite digits (i.e.,4,6,8,9).

Terms

a(0) =94649a(1) =94849a(2) =94949a(3) =96469a(4) =98689a(5) =9446449a(6) =9686869a(7) =9888889a(8) =9889889a(9) =9896989a(10) =9989899a(11) =944999449a(12) =946666649a(13) =946999649a(14) =948898849a(15) =964444469a(16) =964989469a(17) =966848669a(18) =968646869a(19) =968666869a(20) =968868869a(21) =968898869a(22) =968999869a(23) =986444689