N=int(input())
dp2=[0 for _ in range(16)]
dp2[0]=1
mod=10**9+7
for i in range(N):
	dp=dp2.copy()
	dp2=[0 for _ in range(16)]
	for j in range(16):
		dp2[(j*2)%16]+=dp[j]
		dp2[(j*2+1)%16]+=dp[j]
		dp2[(j*2)%16]%=mod
		dp2[(j*2+1)%16]%=mod
	dp2[10]=0
print((pow(2,N,mod)-sum(dp2))%mod)