import java.util.Scanner;

public class Main{
	
	public static long fib(long n) {
		
		if(n == 0){
			return 0;
		}
		return fib(n-1)+n;
	}
	
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		long n = Long.parseLong(s.next());
		long fib1 = fib(n);
		long fib2 = fib(fib1);
		long ans = fib2 % (((long) Math.pow(10, 9)) + 7);
		System.out.println(ans);
		s.close();
	}

}