Program to find Cullen Number in C++

In this tutorial, we will be discussing a program to find Cullen Number.

For this we will be provided with an integer. Our task is to find the cullen number at that position using the formula −

2n* n + 1

Example

 Live Demo

#include <bits/stdc++.h>
using namespace std;
//finding the nth cullen number
unsigned get_cullen(unsigned n){
   return (1 << n) * n + 1;
}
int main(){
   int n = 2;
   cout << get_cullen(n);
   return 0;
}

Output

9