# Program to find Nth term of series 4, 14, 28, 46, 68, 94, 124, 158, …..

Given a number N. The task is to write a program to find the Nth term of the below series:

4, 14, 28, 46, 68, 94, 124, 158…..(N Terms)

Examples:

```Input: N = 4
Output: 46
For N = 4
4th Term = ( 2 * 4 * 4 + 4 * 4 - 2)
= 46

Input: N = 10
Output: 237

```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach: The generalized Nth term of this series:

``` ```

Below is the required implementation:

## C++

 `// CPP program to find the N-th term of the series: ` `// 4, 14, 28, 46, 68, 94, 124, 158, ..... ` `#include ` `#include ` `using` `namespace` `std; ` ` `  `// calculate Nth term of series ` `int` `nthTerm(``int` `n) ` `{ ` `    ``return` `2 * ``pow``(n, 2) + 4 * n - 2; ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` `    ``int` `N = 4; ` ` `  `    ``cout << nthTerm(N) << endl; ` ` `  `    ``return` `0; ` `} `

## Java

 `// Java program to find the N-th term of the series: ` `// 4, 14, 28, 46, 68, 94, 124, 158, ..... ` `import` `java.util.*; ` ` `  `class` `solution ` `{ ` `  `  `// calculate Nth term of series ` `static` `int` `nthTerm(``int` `n) ` `{ ` ` `  `    ``return` `2` `*(``int``)Math.pow(n, ``2``) + ``4` `* n - ``2``; ` ` `  `}  ` ` `  `//Driver code ` `public` `static` `void` `main(String arr[]) ` `{ ` `    ``int` `N = ``4``; ` ` `  `   ``System.out.println(nthTerm(N)); ` `} ` `} ` ` `  `//This code is contributed by Surendra_Gangwar `

## Python3

 `# Python3 program to find the  ` `# N-th term of the series: ` `# 4, 14, 28, 46, 68, 94, 124, 158, ..... ` ` `  `# calculate Nth term of series ` `def` `nthTerm(n): ` ` `  `    ``return` `2` `*` `pow``(n, ``2``) ``+` `4` `*` `n ``-` `2` ` `  `# Driver code ` `N ``=` `4` `print``(nthTerm(N)) ` ` `  `# This code is contributed by ` `# Sanjit_Prasad `

## C#

 `// C# program to find the  ` `// N-th term of the series:  ` `// 4, 14, 28, 46, 68, 94, 124, 158, .....  ` `using` `System;  ` ` `  `class` `GFG  ` `{  ` ` `  `// calculate Nth term of series  ` `static` `int` `nthTerm(``int` `n)  ` `{  ` `    ``return` `2 * (``int``)Math.Pow(n, 2) +  ` `                             ``4 * n - 2;  ` `}  ` ` `  `// Driver Code  ` `public` `static` `void` `Main()  ` `{  ` `    ``int` `N = 4;  ` `    ``Console.Write(nthTerm(N));  ` `}  ` `}  ` ` `  `// This code is contributed ` `// by Sanjit_Prasad `

## PHP

 ` `

Output:

```46
```

Time Complexity: O(1)

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