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In this problem, we are given an integer N. Our task is to create a program to Find Nth term of series 5, 13, 25, 41, 61, …

**Let’s take an example to understand the problem,**

N = 5

61

The series is − 5, 13, 25, 41, 61…

A simple approach to solve the problem is by using the general formula for the nth term of the series. The Nth term is given by,

Nth term = ( (N*N) + ((N+1)*(N+1)) )

**Program to illustrate the working of our solution,**

#include <iostream> using namespace std; int calcNthTerm(int N) { return ( ( (N + 1)*( N + 1) ) + (N*N) ) ; } int main() { int N = 7; cout<<N<<"th term of the series is "<<calcNthTerm(N); return 0; }

7th term of the series is 113

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