#include <stdio.h>

int main()
{
    int m;
    scanf("%d", &m);
    while (m > 0)
    {
        int x;
        scanf("%d", &x);
        int all = 1; 
        int n = 1;  // 用n来记录每一行的个数
        for (int i = 2; i <= x; i++)
        {
            n = n + 2; // 每一行都在第一行的基础上加2
            all = all + n;
        }

        for (int i = x - 1; i >= 1; i--)
        {
            n = n - 2;// 每一行都在第一行的基础上-2
            all = all + n;
        }

        printf("%d\n", all);
        m--;
    }

    return 0;
}