Cut noodles C language

A high rib pull surface , Cut a knife in the middle , You can get 2 Root noodle .

If you fold it in half first 1 Time , Cut a knife in the middle , You can get 3 Root noodle .

If you fold in half continuously 2 Time , Cut a knife in the middle , You can get 5 Root noodle . that , Continuous folding 10 Time , Cut a knife in the middle , How many noodles will you get ？

Ideas ：

Source code ：

#include<stdio.h>
#include<math.h>
int main()
{
    
    double sum=2;
    for(int n=1;n<=10;n++)
        sum+=pow(2.0,n-1);
    printf("%.0f",sum);
    return 0;
}