C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
					
public class Program
{
	public static void Main()
	{
		//Damaris Castrellón
		int a,b;
	    a=4;
		Console.WriteLine("4, 13, 31, 67... What position of the series you would like to know.");
		b=int.Parse(Console.ReadLine());
		for(int i=2; i<=b; i++)
		{
		    a=2*a+5;
		}
			Console.WriteLine(a);
	}
}

 
using System;
                    
public class Program
{
    public static void Main()
    {
        //Damaris Castrellón
        int a,b;
        a=4;
        Console.WriteLine("4, 13, 31, 67... What position of the series you would like to know.");
        b=int.Parse(Console.ReadLine());
        for(int i=2; i<=b; i++)
        {
            a=2*a+5;
        }
            Console.WriteLine(a);
    }
}

Roslyn 2.0 Compiler; Environment version: 4.0.30319.42000

<root xmlns="https://stackoverflow.com/questions/55914228/how-do-i-declare-a-xdocument-namespace-globally-in-c" attr1="attribute one" attr2="attribute two">
  <title>this is the root</title>
  <xhtml>
    <div id="wrapper">
      <p style="first">
        <em>hello</em> world!</p>
    </div>
  </xhtml>
  <element />
  <anotherElement>
    <someNestedElement>Some text content</someNestedElement>
  </anotherElement>
</root>

Last Run:	7:05:04 am
Compile:	0.252s
Execute:	0.047s
Memory:	44.16kb
CPU:	0.125s

View IL Code