Series 17

import java.util.*;

 class Series19
 {
public static void main(String args[])
throws InputMismatchException{
Scanner scan=new Scanner(System.in);

System.out.println("Enter the limit: ");
int n = scan.nextInt();

int i, j, f, p=2, s=0;

for(i=0;i < n; i++){

    f = 1;
    for(j=1;j<=p;j++)
        f = f*j;
    s = s + f;
    p = p + 2;
}

System.out.println("Sum = "+s);

}//end of main
}//end of class