      </p>
<div class="blockquote"><blockquote class="blockquote"><p>
          <span class="inlinemediaobject"><img src="../../../equations/tangent_number_def2.svg"></span>

        </p></blockquote></div>
<p>
        Tangent numbers are used in the computation of Bernoulli numbers, but are
        also made available here.
      </p>
<h5>
<a name="math_toolkit.number_series.tangent_numbers.h0"></a>
        <span class="phrase"><a name="math_toolkit.number_series.tangent_numbers.synopsis"></a></span><a cla