# Icositetragonal Number

Given a number N, the task is to find the Nth Icositetragonal number.

An Icositetragonal number is a class of figurate number. It has a 24-sided polygon called Icositetragon. The N-th Icositetragonal number count’s the number of dots and all others dots are surrounding with a common sharing corner and make a pattern.

Examples:

Input: N = 2
Output: 24

Input: N = 6
Output: 336 Approach: The Nth icositetragonal number is given by the formula:

` `

Below is the implementation of the above approach:

## C++

 `// C++ program to find nth` `// Icositetragonal number`   `#include ` `using` `namespace` `std;`   `// Function to find` `// Icositetragonal number` `int` `Icositetragonal_num(``int` `n)` `{` `    ``// Formula to calculate nth` `    ``// Icositetragonal number` `    ``return` `(22 * n * n - 20 * n) / 2;` `}`   `// Driver Code` `int` `main()` `{` `    ``int` `n = 3;`   `    ``cout << Icositetragonal_num(n) << endl;`   `    ``n = 10;`   `    ``cout << Icositetragonal_num(n);`   `    ``return` `0;` `}`

## Java

 `// Java program to find nth` `// icositetragonal number` `import` `java.util.*;`   `class` `GFG {` `    `  `// Function to find` `// icositetragonal number` `static` `int` `Icositetragonal_num(``int` `n)` `{` `    `  `    ``// Formula to calculate nth` `    ``// icositetragonal number` `    ``return` `(``22` `* n * n - ``20` `* n) / ``2``;` `}`   `// Driver code` `public` `static` `void` `main(String[] args)` `{` `    ``int` `n = ``3``;` `    ``System.out.println(Icositetragonal_num(n));` `    `  `    ``n = ``10``;` `    ``System.out.println(Icositetragonal_num(n));` `}` `}`   `// This code is contributed by offbeat`

## Python3

 `# Python3 program to find nth ` `# Icositetragonal number `   `# Function to find` `# Icositetragonal number` `def` `Icositetragonal_num(n):` `    `  `    ``# Formula to calculate nth ` `    ``# Icositetragonal number ` `    ``return` `(``22` `*` `n ``*` `n ``-` `20` `*` `n) ``/` `2`   `# Driver Code` `n ``=` `3` `print``(``int``(Icositetragonal_num(n))) `   `n ``=` `10` `print``(``int``(Icositetragonal_num(n))) `   `# This code is contributed by divyeshrabadiya07`

## C#

 `// C# program to find nth` `// icositetragonal number` `using` `System;`   `class` `GFG{` `    `  `// Function to find` `// icositetragonal number` `static` `int` `Icositetragonal_num(``int` `n)` `{` `    `  `    ``// Formula to calculate nth` `    ``// icositetragonal number` `    ``return` `(22 * n * n - 20 * n) / 2;` `}`   `// Driver code` `public` `static` `void` `Main(``string``[] args)` `{` `    ``int` `n = 3;` `    ``Console.Write(Icositetragonal_num(n) + ``"\n"``);` `    `  `    ``n = 10;` `    ``Console.Write(Icositetragonal_num(n) + ``"\n"``);` `}` `}`   `// This code is contributed by rutvik_56`

## Javascript

 ``

Output:

```69
1000```

Time Complexity: O(1)

Auxiliary Space: O(1)

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