const MOD: usize = 1e9 as usize + 7;

fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();

    let mut dp = vec![0usize; n+1];
    dp[1] = 1;
    for i in 1..n {
        dp[i+1] += (2*i+1) * dp[i] % MOD;
        dp[i+1] += (2*i+1) * (2*i) / 2 % MOD * dp[i] % MOD;
        dp[i+1] %= MOD;
    }
    println!("{}", dp[n]);
}