#include<iostream>
#include<cstdio>
#include<vector>
#include<map>
#include<tuple>
#include<string>
#include<cmath>
#include<climits>
#include<algorithm>
#include<bitset>
#include<set>
#include<stack>
using namespace std;  
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
#define rep(i,n) for(ll i=0;i<(n);i++)  
#define tii tuple<int,int>
#define tiii tuple<int,int,int>
#define mt make_tuple
#define pb push_back  
#define ALL(a) (a).begin(),(a).end()
#define FST first
#define SEC second  
const int INF = (INT_MAX/2);
const ll LLINF = (LLONG_MAX/2);
const double eps = 1e-5;
const double PI = M_PI;  
#define DEB cerr<<"!"<<endl
#define SHOW(a,b) cerr<<(a)<<" "<<(b)<<endl
#define SHOWARRAY(ar,i,j) REP(a,i)REP(b,j)cerr<<ar[a][b]<<((b==j-1)?((a==i-1)?("\n\n"):("\n")):(" "))
#define DIV 1000000007
ll pow(ll x,ll n,ll m){ll r=1;while(n>0){if((n&1)==1)r=r*x%m;x=x*x%m;n>>=1;}return r%m;}

class FermatCombination{
public:
  vector<ll> factrial; // 階乗
  vector<ll> inverse; // 逆元
  FermatCombination(int size){
    factrial.resize(size+1);
    inverse.resize(size+1);
    factrial[0] = 1;
    inverse[0] = 1;
    for(int i = 1; i < size+1; i++){
      factrial[i] = factrial[i-1] * i % DIV;
      inverse[i] = pow(factrial[i],DIV-2,DIV);
    }
  }
  ll combination(int n, int k){
    return factrial[n]* inverse[k] % DIV * inverse[n - k] % DIV;
  }
};

int main(){
  int n; cin >> n;
  FermatCombination FC(n);
  ll ans = 0;
  rep(i,n+1){
    ans +=FC.combination(n,i) * pow(i,n-i,DIV) % DIV;
    ans %= DIV;
  }
  cout << ans << endl;
}