Palindromes with exactly 2 distinct palindromic prime factors.

Terms

a(0) =6a(1) =22a(2) =33a(3) =55a(4) =77a(5) =202a(6) =262a(7) =303a(8) =393a(9) =505a(10) =626a(11) =707a(12) =939a(13) =1111a(14) =1441a(15) =1661a(16) =1991a(17) =3443a(18) =3883a(19) =7997a(20) =13231a(21) =15251a(22) =18281a(23) =19291a(24) =20602a(25) =22622a(26) =22822a(27) =24842a(28) =26662a(29) =28682