#!/usr/bin/env python3.8
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
MOD = 10 ** 9 + 7

# %%
N = int(read())
fact = [1] * (N + N + 10)
for n in range(1, N + N + 10):
    fact[n] = fact[n - 1] * n % MOD

# %%
print(fact[N + N] * fact[N] * pow((MOD + 1) // 2, N, MOD) % MOD)