A028816 Numbers n such that n^2 is a palindrome with an odd number of digits.

0, 1, 2, 3, 11, 22, 26, 101, 111, 121, 202, 212, 264, 307, 1001, 1111, 2002, 2285, 2636, 10001, 10101, 10201, 11011, 11111, 11211, 20002, 20102, 22865, 24846, 30693, 100001, 101101, 110011, 111111, 200002, 1000001, 1001001, 1002001