title: How to find out all palindromic numbers
body: <p>A <a href="http://en.wikipedia.org/wiki/Palindromic_number" rel="noreferrer">palindromic number</a> or numeral palindrome is a "symmetrical" number like 16461, that remains the same when its digits are reversed.</p>
  
  <p>The term palindromic is derived from palindrome, which refers to a word like rotor that remains unchanged under reversal of its letters.</p>
  
  <p>The first palindromic numbers (in decimal) are:</p>
  
  <pre><code>0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22,
  33, 44, 55, 66, 77, 88, 99, 101, 111,
  121, 131, 141, 151, 161, 171, 181,
  191, ...
  </code></pre>
  
  <p>How to find out all palindromic numbers below, say, 10000?</p>