#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm> 
#include<string>
#include<cstring>
using namespace std;
int main(){
    int n;
    cin >> n;
    while (n--) {
        int a;
        cin >> a;
        int all = a * a + (a - 1) * (a - 1);
        cout << all << endl;
    }
    return 0;
}

 for (int i = 1; i <= 2*a-1; i += 2) {
            total += i;
        }
for (int i = 2*a-3; i >= 1; i -= 2) {
            total += i;
        }