#include <iostream>
#include <algorithm>
#include <cstring>
using namespace std;
typedef long long int ll;
const ll MOD = 1e9 + 7, N = 100000;
ll n, ans = 0, lc = 1, cmb[2][N+1] = {};

ll pw2(ll a, ll b) {
	ll la = a,val=1;
	for (; b != 0;b= b >> 1) {
		if ((b & 1) != 0) val = (val*la) % MOD;
		la = (la*la) % MOD;
	}
	return val;
}

void comb() {
	cmb[0][0] = 1;
	for (int i = 1; i <= n; i++) {
		cmb[i % 2][0] = 1; cmb[i % 2][i] = 1;
		for (int j = 1; j < i; j++) {
			cmb[i % 2][j] = cmb[(i - 1) % 2][j - 1] + cmb[(i - 1) % 2][j];
			cmb[i % 2][j] %= MOD;
		}
		fill(cmb[(i-1) % 2], cmb[(i-1) % 2 + 1],0);
	}

}

int main() {
	cin >> n;
	comb();
	for (int i = 1; i <= n; i++) {
		ans += (cmb[n%2][i]%MOD) * pw2(i, n - i);
		ans %= MOD;
	}
	cout << ans << endl;
	return 0;
}