main = readLn >>= print . ps

ps 1 = 2
ps n
  | odd n = center *% inner *% outer
  | otherwise = inner *% outer
  where
    center = 3
    inner = powMod 5 (div n 2 - 1)
    outer = if n > 1 then 4 else 1

modulus :: Integer
modulus = 1000000007

(+%) :: Integer -> Integer -> Integer
(+%) x y = mod (x + y) modulus

(*%) :: Integer -> Integer -> Integer
(*%) x y = mod (x * y) modulus

powMod :: Integer -> Integer -> Integer
powMod x n
  | n == 0 = 1
  | odd n = x *% powMod x (n-1)
  | otherwise = let y = powMod x (div n 2) in y *% y