title: Get all numbers that add up to a number
body: <p>I'm trying to find a way to display all the possible sets of X integers that add up to a given integer. for example to get all 2 integer sets that make 5 I would have:</p>
  
  <pre><code>1, 4
  2, 3
  </code></pre>
  
  <p>Or for 3 integers that make 6:</p>
  
  <pre><code>1, 1, 4
  1, 2, 3
  2, 2, 2
  </code></pre>
  
  <p>I only need whole numbers not including 0 and it only needs to work on up to about 15 in a set and 30 max. number.</p>
  
  <p>I'm not even sure if this has a term mathematically. It's similar to factorisation I guess?</p>