">2</font></td><td> </td>
   <td> </td><td><font size="4">vd</font><font size="2">3</font></td><td> </td>
   <td> </td><td> </td>
   <td> </td><td><font size="4">vd</font><font size="2">n</font></td><td> </td>
   </tr>

   <tr>
   </tr>

   <tr align="center">
   <th rowspan="2">wd = [</th>
   <td> </td><td>3×1</td><td> </td>
   <td> </td><td>3×1</td><td> </td>
   <td> </td><td>3×1</td><td> </td>
   <td> </td><th rowspan="2">…</th><td> </td>
   <td> </td><td>3×1</td><td> </td>
   <th rowspan="2">]</fo