Problem 2329. Finding the next number in a number list, are you able to crack it!

So it goes like this, I give a number list and you find the next value!

I found a way to do it, just wondering how many others can to!

This could be a fun test of skill! Please try and see if you can get it!

Example:

   x =  [ ...
    11;
     4;
    16;
     3;
     3;
    15;
     6;
    17;
    10;
    18;
     7;
    13;
    15;
     5;
    24;
     5;
     3;
     3];
 NextValue = 3;

 %% Next value after x(1), so your finding the ? in sequence x = [?; 11; 4; 16; 3; ... 3];

Good luck, just saying, it is tricky! Many have solved this, but the key is to find the pattern...