C# Online Compiler | .NET Fiddle

using System;
					
public class Program
{
	public static void Main()
	{
		test(); // do not change or remove
	}
		
    // Instructions(Method):
    // Write the method pyramidCount
    // 1. fill the correct return type and parameter
    // 2. implement the method
        
    public static /*return type*/ pyramidCountx(/*parameter*/) {
    	// Add your code here
		
    }

	//This method tests that your code is correct
	public static void test() {
		if(pyramidCount(1) == 1 && 
			pyramidCount(2) == 5 && 
			pyramidCount(3) == 14 && 
			pyramidCount(4) == 30 && 
			pyramidCount(24) == 4900 && 
			pyramidCount(88) == 231044) 
		{
			  Console.WriteLine("Congradulations! Challenge Solved!");
		} 
		else 
		{
			  Console.WriteLine("Challenge failed!");
		}
	}
}

 
using System;
                    
public class Program
{
    public static void Main()
    {
        test(); // do not change or remove
    }
        
    // Instructions(Method):
    // Write the method pyramidCount
    // 1. fill the correct return type and parameter
    // 2. implement the method
        
    public static /*return type*/ pyramidCountx(/*parameter*/) {
        // Add your code here
        
    }
​
    //This method tests that your code is correct
    public static void test() {
        if(pyramidCount(1) == 1 && 
            pyramidCount(2) == 5 && 
            pyramidCount(3) == 14 && 
            pyramidCount(4) == 30 && 
            pyramidCount(24) == 4900 && 
            pyramidCount(88) == 231044) 
        {
              Console.WriteLine("Congradulations! Challenge Solved!");
        } 
        else 
        {
              Console.WriteLine("Challenge failed!");
        }
    }
}
  

Cached Result

Environment version: .NET 9.0.0 (9.0.0)
System.Text.Json version: System.Text.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51

Testing deserialization of "" to type System.Nullable`1[System.DateTime]:
   Succeeded, value = null
Testing deserialization of "" to type System.Nullable`1[System.Int32]:
   Succeeded, value = null
Testing deserialization of "" to type System.Nullable`1[System.Double]:
   Succeeded, value = null
Testing deserialization of "" to type System.Nullable`1[System.Decimal]:
   Succeeded, value = null
Testing round-trip of System.Nullable`1[System.DateTime] 06/12/2025 00:22:53
   Passed.
Testing round-trip of System.Nullable`1[System.DateTime]
   Passed.
Testing round-trip of System.DateTime 06/12/2025 00:22:53
   Passed.
Testing round-trip of System.Nullable`1[System.Int32] 1
   Passed.
Testing round-trip of System.Nullable`1[System.Int32]
   Passed.
Testing round-trip of System.Nullable`1[System.Decimal] 1.010101
   Passed.
Testing round-trip of System.Nullable`1[System.Decimal]
   Passed.
Testing round-trip of System.Nullable`1[System.Double] 1.010101
   Passed.
Testing round-trip of System.Nullable`1[System.Double]
   Passed.