Palindromic primes in the sense of A007500 with digits '0', '1' and '4' only.

Terms

a(0) =11a(1) =101a(2) =11411a(3) =100411a(4) =101141a(5) =114001a(6) =114041a(7) =140411a(8) =141101a(9) =1004141a(10) =1010411a(11) =1040141a(12) =1041041a(13) =1100441a(14) =1114111a(15) =1140101a(16) =1144441a(17) =1401401a(18) =1410401a(19) =1411141a(20) =1414001a(21) =1440011a(22) =1444411a(23) =1444441a(24) =10010411a(25) =10011101a(26) =10041011a(27) =10044011