s="keyword">then</span>
<a name="l00223"></a>00223 
<a name="l00224"></a>00224          dl(0, 0) = 1.0_dp
<a name="l00225"></a>00225 
<a name="l00226"></a>00226       <span class="comment">! For the special cases of l = 1 use the direct formula.</span>
<a name="l00227"></a>00227       <span class="keyword">else</span> <span class="keyword">if</span> (l == 1) <span class="keyword">then</span>
<a name="l00228"></a>00228 
<a name="l00229"></a>00229          <span class="comment">! These formulae are taken dire