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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 1,8, 54, 384 ...

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

N = 4

384

4^{th} term − (4 * 4 * (4!) = 384

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

Nth term = ( N * N * (N !) )

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

#include <iostream> using namespace std; int calcFact(int N) { int fact = 1; for (int i = 1; i <= N; i++) fact = fact * i; return fact; } int calcNthTerm(int N) { return ( N*N*(calcFact(N)) ); } int main() { int N = 5; cout<<N<<"th term of the series is "<<calcNthTerm(N); return 0; }

5th term of the series is 3000

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