import sys
import numpy as np

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

# N log N があるが N^2 で

MOD = 10**9 + 7

N = int(read())

dp = np.array([1], np.int64)
for n in range(2, N + 1):
    newdp = np.zeros(n, np.int64)
    if n & 1:
        newdp[:-1] = np.cumsum(dp[::-1])[::-1]
    else:
        newdp[1:] = np.cumsum(dp)
    dp = newdp % MOD

x = 2 * dp.sum() % MOD
if N <= 2:
    x = 0
print(x)