title: How to plot a sum with Maple?
body: <p>I would like to draw with Maple the following expression : </p>
  
  <pre><code>> I_n:=Sum((H_(k+1)H_(n-k+1))/k+2,k=0..n);</code></pre>
  
  <p>witch <pre><code>>  H_n:=sum(1/k,k=1..n);</code></pre></p>
  
  <p>My work:</p>
  
  <pre><code>>f:=n->sum(1/k,k=1..n); 
  I_n:=sum(f(j+1)*f(n-j+1)/(j+2), j = 0 .. n);</code></pre>
  
  <p>But I do not see how I can draw this. </p>
  
  <p>Thank you for your help.</p>