import sys
input = sys.stdin.readline

mod=10**9+7

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

DP=[1]*8

for i in range(N-3):
    NDP=[0]*8

    NDP[0]=DP[0]+DP[1]
    NDP[1]=DP[2]+DP[3]
    
    NDP[2]=DP[4]
    NDP[3]=DP[6]+DP[7]
    
    NDP[4]=DP[0]+DP[1]
    NDP[5]=DP[2]+DP[3]
    
    NDP[6]=DP[4]+DP[5]
    NDP[7]=DP[6]+DP[7]

    for j in range(8):
        DP[j]=NDP[j]%mod

print((pow(2,N,mod) - sum(DP))%mod)