#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin >> n;
	int a[1000];
	a[0] = 1;
	a[1] = 1;
	int x;
	for(int j=0;j<n;j++){
		cin >> x;
		for(int i=2;i<=x;i++)
			a[i] = a[i-1] + 4*(i-1);
		cout << a[x] << endl;
	}		
	return 0;
}