1+3+7+15+31+63+127+.............. upto n terms

 

1+3+7+15+31+63+127+.............. upto n terms

import java.util.Scanner;
class SUM_1_3_7_15
 {
 public static void main(String[] args)
 {
  Scanner sc=new Scanner(System.in);
  System.out.print("Enter N: ");
  int n = sc.nextInt();
  int x = 0;
  int s=0;
  for(int i = 0; i< n; i++) 

{

   x = x + (int) Math.pow(2,i);
   System.out.print(x+"  ");
   s=s+x;   
} 
  System.out.println();
  System.out.print(s);
 }
}