MOD = 10 ** 9 + 7

n = int(input())
dp = [[0] * 5 for _ in range(n + 1)]
dp[0][0] = 1
for i in range(1, n + 1):
    # X[i] == "1"
    dp[i][1] += dp[i - 1][0]
    dp[i][1] += dp[i - 1][1]
    dp[i][3] += dp[i - 1][2]
    dp[i][1] += dp[i - 1][3]
    dp[i][4] += dp[i - 1][4]
    
    # X[i] == "0"
    dp[i][0] += dp[i - 1][0]
    dp[i][2] += dp[i - 1][1]
    dp[i][0] += dp[i - 1][2]
    dp[i][4] += dp[i - 1][3]
    dp[i][4] += dp[i - 1][4]
    
    for j in range(5):
        dp[i][j] %= MOD

print(dp[-1][-1])