using System;

public class Program

{

    public static void Main()

    {

        int i = 5;

        int j = 9;

        int k = 6;

        long expectedResult = 56;

        var result = getSequenceSum(i,j,k);

        var success = result == expectedResult;

        Console.WriteLine("result = " + result);

        Console.WriteLine("success = " + success);

    }

    public static long getSequenceSum(int i, int j, int k) 

    {

        // SOLUTION GOES HERE....

        return 0;

    }

}