費氏數列

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] a = new int[20];

            a[0] = a[1] = 1;
            Console.WriteLine("" + a[0]);
            Console.WriteLine("" + a[1]);
            for (int i = 2; i <  20; i++)
            {
              
                a[i] = a[i - 2] + a[i - 1];
                Console.WriteLine("" + a[i]);
            }
           
        
        }
    }
}