Palindromes with consecutive digits that differ exactly by 1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =101a(10) =121a(11) =212a(12) =232a(13) =323a(14) =343a(15) =434a(16) =454a(17) =545a(18) =565a(19) =656a(20) =676a(21) =767a(22) =787a(23) =878a(24) =898a(25) =989a(26) =10101a(27) =12121a(28) =12321a(29) =21012