C :

#include<stdio.h>
int main()
{
	int i,n,s=0,f=1;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		f=f*i;
		s=s+f;
	}
	printf("%d\n",s);
	return 0; 
}

C++ :

#include<stdio.h>
int main()
{
	int n,t=1,s=0;
	scanf("%d",&n);
	
	for(int i=1;i<=n;i++)
	{
		t*=i;
		s+=t;
		
	}
	printf("%d",s);
	 
	return 0;
}

Java :

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int sum =0;
        for (int i = 1; i <= n; i++){
            sum+=getSum(i);
        }
        System.out.println(sum);
    }
    public static int getSum(int n){
        int sum = 1;
        for (int i = 1; i<=n;i++){
            sum*=i;
        }
        return sum;
    }
}

Python :

# coding=utf-8
#!/usr/bin/python2
import sys

n=int(input())
sum=0
sum1=1
for i in range(1,n+1):
    sum1=1
    for j in range (1,i+1):
        sum1=sum1*j
    sum=sum+sum1
print sum

C# :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    internal class Program
    {
        static void Main()
        {
           
            int sum = 0;
          
            int n = Convert.ToInt32(Console.ReadLine());
            double ans = 0;
            for (int i = 1; i <= n; i++)
            {
                int m = 1;
                for (int j = 1; j <= i; j++)
                {
                    m = m * j;
                }
                sum = sum + m;
            }
            Console.WriteLine(sum); 
            Console.ReadKey();
     
        }
    }
}