|  |  |  |  |  |   | 
Here is a look at the rabbits method at work on 3, the same 
argument used previously with recursivePowerOfTwo.  The value 
answered is the number of rabbits at the end of the third month. 
Receivers     | ^      Answers 
            3 | |  3   
              v | 
           *-------------* 
           | rabbits     | 
           *-------------* 
              | ^    |  ^ 
            2 | |  1 |  *------------* 
              | |    *-------------* | 
              v | 2                v | 1 
           *-------------*   *-------------* 
           | rabbits     |   | rabbits     | 
           *-------------*   *-------------* 
              | ^    |  ^ 
            1 | |  0 |  *------------* 
              | |    *-------------* | 
              v | 1                v | 1 
           *-------------*   *-------------* 
           | rabbits     |   | rabbits     | 
           *-------------*   *-------------*