import itertools
import numpy as np

MOD = 10**9 + 7


def pow_matrix_mod(x, n, mod=MOD):
    x = x.astype(object)
    if not n:
        return np.eye(len(x), dtype=object)
    if n % 2 == 0:
        return pow_matrix_mod(x @ x % mod, n // 2) % mod
    else:
        return x @ pow_matrix_mod(x @ x % mod, (n - 1) // 2) % mod


# 0: ドミノ無し, 1: 左列にまたがる横ドミノあり，2: 右列にまたがる横ドミノあり，3: 縦ドミノあり
cols = []
for i in range(3):
    cols.append((3, 3, i))
    cols.append((i, 3, 3))
for t in itertools.product(range(3), repeat=3):
    if t[0] == 0 and t[1] == 0:
        continue
    if t[1] == 0 and t[2] == 0:
        continue
    cols.append(t)

matr = np.zeros((len(cols), len(cols)))
for i, col_left in enumerate(cols):
    for j, col_right in enumerate(cols):
        for k in range(3):
            if col_left[k] == 0 and col_right[k] == 0:
                break
            if (col_left[k] == 2) ^ (col_right[k] == 1):
                break
        else:
            matr[i, j] = 1

N = int(input())
start = np.zeros(len(cols), dtype=np.int64)
for i, col in enumerate(cols):
    if 1 in col:
        continue
    start[i] = 1
end = np.zeros(len(cols), dtype=np.int64)
for i, col in enumerate(cols):
    if 2 in col:
        continue
    end[i] = 1

print(start @ pow_matrix_mod(matr, N - 1).astype(np.int64) @ end % MOD)