using System;

class Technical_Test
{
    static void Main()
    {
        int[] array = { 1, 2, 2, 3, 3, 3, 5, 7, 11, 15 };
        int n = array.Length;
        double sum = 0;
        for (int i = 0; i <= n - 1; i++)
        {
            double result = Result(array[i], i);
            sum += result;
            Console.WriteLine($"i = {i} -> {result}");
        }
        Console.WriteLine($"Sum: {sum}");
    }

    static double Result(int x, int i)
    {
        double factorial = 1;
        for (int j = 2; j <= i; j++)
        {
            factorial *= j;
        }
        return Math.Pow(x, i) / factorial;
    }
}