If the pattern below is continued, what number will appear
  directly below 400?<br />
  <br />
  



 
  
<table>
<tr><td align="center"></td><td align="center"></td><td align="center"></td><td align="center">1 </td><td align="center"></td><td align="center"></td><td align="center"></td></tr>
<tr><td align="center"></td><td align="center"></td><td align="center">2 </td><td align="center">3 </td><td align="center">4 </td><td align="center"></td><td align="center"></td></tr>
<tr><td align="center"></td><td align="center">5 </td><td align="center">6 </td><td align="center">7 </td><td align="center">8 </td><td align="center">9 </td><td align="center"></td></tr>
<tr><td align="center">10 </td><td align="center">11 </td><td align="center">12 </td><td align="center">13 </td><td align="center">14 </td><td align="center">15 </td><td align="center">16
  </td></tr></table>




  <br />