N = int(input())

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

dp = [1]*16
dp[10] = 0
MOD = 10**9+7

for _ in range(N-4):
    ndp = [0]*16
    
    for S in range(16):
        for i in range(2):
            nS = S//2+8*i
            
            if nS!=10:
                ndp[nS] += dp[S]
                ndp[nS] %= MOD
    
    dp = ndp

print((pow(2, N, MOD)-sum(dp))%MOD)