using System; using System.Collections.Generic; using System.Linq; using System.IO; using static System.Console; using Pair = System.Collections.Generic.KeyValuePair<int, int>; //using System.Numerics; //using static System.Math; class Program { static void Main() { //SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false }); new Program().solve(); Out.Flush(); } Scanner cin = new Scanner(); readonly int[] dd = { 0, 1, 0, -1, 0 }; readonly int mod = 1000000007; readonly string alfa = "abcdefghijklmnopqrstuvwxyz"; readonly string ALFA = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; int N; void solve() { N = cin.nextint; A = new long[N + 1]; B = new long[N + 1]; table(N); long sum = 0; for (int i = 0; i <= N; i++) { sum += combi(N, i) * powmod(N - i, i, mod) % mod; sum %= mod; //WriteLine(sum); } WriteLine(sum); } long[] A, B; //a^b(mod p) solution works in O(logb). long powmod(long a, long b, long p) { if (b == 0) return 1; if (b % 2 == 0) { long d = powmod(a, b / 2, p); return d * d % p; } else { return a * powmod(a, b - 1, p) % p; } } void table(int n) { A[0] = 1; for (int i = 0; i < n; i++) { A[i + 1] = A[i] * (i + 1) % mod; } B[n] = powmod(A[n], mod - 2, mod); for (int i = 0; i < n; i++) { B[n - i - 1] = B[n - i] * (n - i) % mod; } } long combi(int n, int r) { return A[n] * B[r] % mod * B[n - r] % mod; } } class Scanner { string[] s; int i; char[] cs = new char[] { ' ' }; public Scanner() { s = new string[0]; i = 0; } public string[] scan { get { return ReadLine().Split(); } } public int[] scanint { get { return Array.ConvertAll(scan, int.Parse); } } public long[] scanlong { get { return Array.ConvertAll(scan, long.Parse); } } public double[] scandouble { get { return Array.ConvertAll(scan, double.Parse); } } public string next { get { if (i < s.Length) return s[i++]; string st = ReadLine(); while (st == "") st = ReadLine(); s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries); i = 0; return next; } } public int nextint { get { return int.Parse(next); } } public long nextlong { get { return long.Parse(next); } } public double nextdouble { get { return double.Parse(next); } } }