[benjaminjones]

Until three, you can make them static, after that simple current number * 2;

Код:

            Console.WriteLine(1);
            Console.WriteLine(2);
            Console.WriteLine(3);
            var res = 3;
            for (int i = 0; i < 7; i++)
            {
                res *= 2;
                Console.WriteLine(res);
            }