Palindromes that cannot be expressed as the difference of two palindromes.

Terms

a(0) =919a(1) =9119a(2) =90109a(3) =91019a(4) =91119a(5) =91219a(6) =91319a(7) =91419a(8) =91519a(9) =91619a(10) =91719a(11) =91819a(12) =91919a(13) =92129a(14) =93139a(15) =94149a(16) =95159a(17) =96169a(18) =97179a(19) =98189a(20) =99199a(21) =901109a(22) =910019a(23) =911119a(24) =912219a(25) =913319a(26) =914419a(27) =915519a(28) =916619a(29) =917719