n = int(input())
MOD = 10**9 + 7

# dp[i][j][k][l] := 長さiで終わるときの通り数
# j, k, lはケンかパーかを表す
dp = [[[[0]*2 for _ in range(2)] for _ in range(2)] for i in range(n+1)]
# 初期化
dp[3][0][0][0] = 0
dp[3][0][0][1] = 0
dp[3][0][1][0] = 1
dp[3][0][1][1] = 0
dp[3][1][0][0] = 1
dp[3][1][0][1] = 0
dp[3][1][1][0] = 0
dp[3][1][1][1] = 0

for i in range(3, n):
    dp[i+1][1][0][0] = dp[i][0][0][1]
    dp[i+1][1][0][1] = dp[i][0][1][0]
    dp[i+1][0][1][0] = dp[i][1][0][0] + dp[i][1][0][1]
    dp[i+1][0][0][1] = dp[i][0][1][0]
    dp[i+1][1][0][0] %= MOD
    dp[i+1][1][0][1] %= MOD
    dp[i+1][0][1][0] %= MOD
    dp[i+1][0][0][1] %= MOD
ans = 0
for j in range(2):
    for k in range(2):
        for l in range(2):
            ans += dp[n][j][k][l]
if n == 1:
    print(1) #ケン
elif n == 2:
    print(2) #ケンケン、ケンパ
else:
    print(ans % MOD)