public static void Main()
Console.WriteLine("Fibonacci Factorial");
Console.Write("Enter a number: ");
input = Console.ReadLine();
if (Int32.TryParse(input, out inputNumber) == true)
Console.WriteLine("0 or negative numbers are not allowed. ");
Console.WriteLine("Sequence:");
Console.Write(firstNumber + " " + secondNumber + " ");
for (int i = 2; i <= inputNumber; ++i)
sequence = firstNumber + secondNumber;
Console.Write(sequence + " ");
firstNumber = secondNumber;