mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    dp = [0] * 16
    dp[0] = 1
    for _ in range(N):
        dp_new = [0] * 16
        for state in range(16):
            state_new0 = (state << 1) % 16
            state_new1 = state_new0 + 1
            if state_new0 != 10:
                dp_new[state_new0] = (dp_new[state_new0] + dp[state])%mod
            dp_new[state_new1] = (dp_new[state_new1] + dp[state]) % mod
        dp = dp_new
    print((pow(2, N, mod) - (sum(dp) % mod))%mod)


if __name__ == '__main__':
    main()