Редици Find index in sequence N, N+1, 2*N

using System;
using System.Collections.Generic;

class FindIndex
{
    static void Main()
    {
        int n = 3;
        int p = 16;

        Queue<int> queue = new Queue<int>();
        queue.Enqueue(n);
        int index = 0;
        while (queue.Count > 0)
        {
            int current = queue.Dequeue();
            index++;
            if (current == p)
            {
                Console.WriteLine("index = {0}", index);
                break;
            }
            queue.Enqueue(current + 1);
            queue.Enqueue(2 * current);
        }
    }
}