using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Problem523
{
    class Program
    {
        static void Main(string[] args)
        {
            long N = long.Parse(Console.ReadLine());

            long ans = 1;
            for(long i=2; i <= 2* N; i++)
            {
                long j = i;
                if (j % 2 == 0)
                    j /= 2;
                ans = ans * j % 1000000007;
            }
            Console.WriteLine(ans);
        }
    }
}