import sys
sys.setrecursionlimit(10**6)

mod = 10**9+7

n = int(input())
if(n <= 3):
	print(0)
	exit(0)

def memo_dp(ldp,k):
	if(k == n):
		return ldp
	dp = [0]*8
	dp[0] = (ldp[0] + ldp[4]) % mod
	dp[1] = (ldp[0] + ldp[4]) % mod
	dp[2] = ldp[1]
	dp[3] = (ldp[1] + ldp[5]) % mod
	dp[4] = (ldp[2] + ldp[6]) % mod
	dp[5] = (ldp[2] + ldp[6]) % mod
	dp[6] = (ldp[3] + ldp[7]) % mod
	dp[7] = (ldp[3] + ldp[7]) % mod
	return memo_dp(dp,k+1)

dp = memo_dp([1]*8,3)
ans = (pow(2,n,mod) + mod*10 - sum(dp)) % mod

print(ans)