td><tt class="literal"><span class="pre">Sequence</span></tt></td>
<td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td>
<td>A sequence to iterate.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">State</span></tt></td>
<td>Any type</td>
<td>The initial state for the first <tt class="literal"><span class="pre">BackwardOp</span></tt>
/ <tt class="literal"><span class="pre">ForwardOp</span></tt> application.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">