#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>

using namespace std;

const long long modc=1e9+7, MAX=555;
vector<long long> f, finv;

long long inv(long long x, long long e=modc-2){
    long long ans = 1;
    x %= modc;

    while (e > 0){
        if ((e & 1LL)) ans = (ans * x) % modc;
        e = e >> 1LL;
        x = (x*x) % modc;
    }

    return ans;
}

void init(){
    f.resize(MAX+1); finv.resize(MAX+1);
    f[0] = 1;
    for (int i=1; i<=MAX; i++) f[i] = (f[i-1]*i) % modc;
    finv[MAX] = inv(f[MAX]);
    for (int i=MAX-1; i>=0; i--) finv[i] = (finv[i+1] * (i+1)) % modc;
}

long long C(long long n, long long k){
    if (n < k || k < 0) return 0;

    return (((f[n] * finv[k]) % modc) * finv[n-k]) % modc;
}

vector<vector<long long>> stirling;

void stirling_number(long long n, long long modc=1e9+7){
    stirling.resize(n+1);
    for (long long i=0; i<=n; i++){
        stirling[i].resize(n+1);
        stirling[i][0] = 0;
    }

    stirling[0][0] = 1;

    for (long long i=1; i <= n; i++){
        for (long long j=1; j <= i; j++){
            stirling[i][j] = (stirling[i-1][j-1] + (j*stirling[i-1][j]) % modc) % modc;
        }
    }
}

int main(){
    init();
    stirling_number(555);
    long long N, S=0;
    cin >> N;
    
    for (int i=1; i<=N; i++){
        for (int j=1; j<=i; j++){
            S += ((C(N, i)*stirling[i][j]) % modc) * inv(j*(j-1), N-i) % modc;
            S %= modc;
        }
    }

    cout << S << endl;

    return 0;
}