import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        if (n < 4) {
            System.out.println(0);
            return;
        }
        int[][][][] dp = new int[n][2][2][2];
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                for (int k = 0; k < 2; k++) {
                    dp[2][i][j][k] = 1;
                }
            }
        }
        for (int i = 3; i < n; i++) {
            for (int a = 0; a < 2; a++) {
                for (int b = 0; b < 2; b++) {
                    for (int c = 0; c < 2; c++) {
                        for (int d = 0; d < 2; d++) {
                            if (a == 1 && b == 0 && c == 1 && d == 0) {
                                continue;
                            }
                            dp[i][b][c][d] += dp[i - 1][a][b][c];
                            dp[i][b][c][d] %= MOD;
                        }
                    }
                }
            }
        }
        int ans = 0;
        for (int [][] arr1 : dp[n - 1]) {
            for (int [] arr2 : arr1) {
                for (int x : arr2) {
                    ans += x;
                    ans %= MOD;
                }
            }
        }
        System.out.println((pow(2, n) - ans + MOD) % MOD);
    }
    
    static long pow(long x, int p) {
        if (p == 0) {
            return 1;
        } else if (p % 2 == 0) {
            return pow(x * x % MOD, p / 2);
        } else {
            return pow(x, p - 1) * x % MOD;
        }
    }
}

class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}