Roots of 'non-palindromic squares remaining square when written backwards'.

Terms

a(0) =12a(1) =13a(2) =21a(3) =31a(4) =33a(5) =99a(6) =102a(7) =103a(8) =112a(9) =113a(10) =122a(11) =201a(12) =211a(13) =221a(14) =301a(15) =311a(16) =1002a(17) =1003a(18) =1011a(19) =1012a(20) =1013a(21) =1021a(22) =1022a(23) =1031a(24) =1101a(25) =1102a(26) =1103a(27) =1112a(28) =1113a(29) =1121