>Short Table of manual calculation for N=8</h3>
 <ol>
 <li><b>x</b> is the input vector to be transformed,</li>
 <li><b>y</b> is the output vector (Fast Hadamard transform of <b>x</b>),</li>
 <li>a and b are helper rows.</li>
 </ol>
 <table align="center" border="1" cellpadding="3">
 <tbody align="center">
 <tr>
     <th>x</th>
     <th>a</th>
     <th>b</th>
     <th>y</th>
 </tr>
 <tr>
     <th>x<sub>0</sub></th>
     <td>a<sub>0</sub> = x<sub>0</sub> + x<sub>1</sub></td>
     <td>b<sub>0</sub> = a<sub>0<