title: Creating a Recursive Function for Number Sequence
body: <p>I know this is basic CS knowledge, but I still can't grasp the idea of doing a recursive function over a for loop. I'm still confused on the idea of recursion especially with numbers. Lets say there's a numerical sequence 3, 11, 27, 59, 123.... I know how to figure out the mathematical recursive sequence which is just An = An-1 + (8*(n-1)), but don't really know how to put this into a C++ recursive function.</p>
  
  <p>Can someone outline the creation of a recursive function for the above numerical sequence?</p>