n=int(input());mod=10**9+7
dp=[[0,0] for i in range(16)]
dp[0][0]=1;dp[1][0]=1
for i in range(n-1):
    dp2=[[0,0] for i in range(16)]
    for j in range(16):
        if j==10:
            dp[j][1]+=dp[j][0];dp[j][0]=0;dp[j][1]%=mod
        for l in range(2):
            dp2[(j<<1)%16][l]+=dp[j][l]; dp2[(j<<1)%16][l]%=mod
            dp2[((j<<1)+1)%16][l]+=dp[j][l];dp2[((j<<1)+1)%16][l]%=mod
    dp=dp2
ans=0
for i in range(16):
    if i==10:
        dp[i][1]+=dp[i][0]
    ans+=dp[i][1];ans%=mod
print(ans)