Count of strings that can be formed using a, b and c under given constraints

#include <bits/stdc++.h>
using namespace std;

int main() {
	
	int t; cin>>t;
	
	while(t--)
	{
	    int n; cin>>n; int ans=1+2*n+(((n)*(n*n-1))/2);
	    
	      
	      cout<<ans<<endl;
	}
	
	

	return 0;
}