fn main() {
    let mut t = String::new();
    std::io::stdin().read_line(&mut t).ok();
    let t: usize = t.trim().parse().unwrap();
    let queries = (0..t).map(|_| {
            let mut n = String::new();
            std::io::stdin().read_line(&mut n).ok();
            let n: usize = n.trim().parse().unwrap();
            n
        })
        .collect::<Vec<_>>();

    for &n in queries.iter() {
        println!("{}", 2 * n * (n * n - 3 * n + 2) / 3);
    }
}