Given a number n, the task is to find the nth tetradecagonal number. A tetradecagonal number is 14-sided polygon called tetrakaidecagon or tetradecagon and belongs to the figurative number. The nth tetradecagonal number doted with some dots and create a series of the pattern. They have a common sharing corner point and doted with their spaces to each other. The dots continue with nth nested loop.

Examples :

Input : 5
Output :125

Input :7
Output :259

Formula for nth tetradecagonal number :-




## C++

 // Program to find nth  // Tetradecagonal number  #include  using namespace std;     // Function to find  // Tetradecagonal number  int tetradecagonal_num(int n)  {      // Formula to calculate nth      // tetradecagonal number=      return (12 * n * n - 10 * n) / 2;  }     // Driver Code  int main()  {      int n = 2;      cout << n << " th Tetradecagonal number: ";      cout << tetradecagonal_num(n);      cout << endl;      n = 6;      cout << n << " th Tetradecagonal number: ";      cout << tetradecagonal_num(n);         return 0;  }

## Java

 // Java Program to find nth  // Tetradecagonal number  import java.io.*;     class GFG   {         // Function to find  // Tetradecagonal number  static int tetradecagonal_num(int n)  {      // Formula to calculate nth      // tetradecagonal number=      return (12 * n * n - 10 * n) / 2;  }     // Driver Code  public static void main (String[] args)   {  int n = 2;  System.out.print(n + " th Tetradecagonal" +                                " number: ");  System.out.println(tetradecagonal_num(n));     n = 6;  System.out.print(n + " th Tetradecagonal" +                                " number: ");  System.out.print(tetradecagonal_num(n));     }  }  // This code is code is  // contributed by m_kit

## Python 3

 # Program to find nth  # Tetradecagonal number     # Tetradecagonal number  # number function  def tetradecagonal_num(n) :             # Formula to calculate      # nth Tetradecagonal       # number return it       # into main function.      return (12 * n * n -              10 * n) // 2    # Driver Code  if __name__ == '__main__' :                 n = 2     print(n,"th Tetradecagonal " +                      "number : " ,               tetradecagonal_num(n))         n = 6     print(n,"th Tetradecagonal " +                      "number : " ,               tetradecagonal_num(n))     # This code is contributed ajit

## C#

 // C# Program to find nth  // Tetradecagonal number  using System;     class GFG  {             // Function to find      // Tetradecagonal number      static int tetradecagonal_num(int n)      {                 // Formula to calculate nth      // tetradecagonal number      return (12 * n * n -               10 * n) / 2;      }     // Driver Code  static public void Main ()  {      int n = 2;      Console.Write(n + "th Tetradecagonal" +                                " number: ");      Console.WriteLine(tetradecagonal_num(n));         n = 6;      Console.Write(n + "th Tetradecagonal" +                                " number: ");      Console.WriteLine(tetradecagonal_num(n));  }  }     // This code is contributed by ajit

## PHP

 

Output :

2 th Tetradecagonal number: 14