a(n) is the unique k such that palindrome A068065(n) = k + reverse(k).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =10a(6) =100a(7) =120a(8) =130a(9) =140a(10) =1000a(11) =10000a(12) =10100a(13) =10200a(14) =10300a(15) =10400a(16) =100000a(17) =1000000a(18) =1001000a(19) =1002000a(20) =1003000a(21) =1004000a(22) =10000000a(23) =100000000a(24) =100010000a(25) =100020000a(26) =100030000a(27) =100040000a(28) =1000000000a(29) =10000000000