</tr>
<tr>
<td>
              <p>
                first_feigenbaum
              </p>
            </td>
<td>
            </td>
<td>
              <p>
                4.6692016
              </p>
            </td>
<td>
              <p>
                <a href="https://en.wikipedia.org/wiki/Feigenbaum_constants" target="_top">First
                Feigenbaum constant</a>
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
                plastic
              </p>
            </td>
<td>
  