use std::io;

fn main() {
	let mut n = String::new();
	io::stdin().read_line(&mut n).ok();
	let n: u64 = n.trim().parse().unwrap();
	let mut ans: u64 = 0;
	for i in 0..n{
		ans += power(i + 1, i % 3 + 1);
	}
	println!("{}", ans);
}

fn power(num: u64, repeat: u64) -> u64{
	match repeat{
		0 => 1,
		1 => num,
		_ => {
			let x = power(num, repeat / 2);
			if repeat %2 == 0{
				x * x
			} else {
				x * x * num
			}
		}
	}
}