#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=400010;
const int INF=0x3f3f3f3f3f3f3f3f;
const int mod=1e9+7;
int inv[N];
int ijc[N];
int jc[N];
void init(int n){
	inv[1]=1;
	jc[0]=1;
	ijc[0]=1;
	for(int i=2;i<=n;i++)inv[i]=(mod-mod/i)*inv[mod%i]%mod;
	for(int i=1;i<=n;i++){
		jc[i]=jc[i-1]*i%mod;
		ijc[i]=ijc[i-1]*inv[i]%mod;
	}
	return;
}
int C(int n,int m){
	if(n<m)return 0;
	int fz=jc[n];
	int fm=ijc[m]*ijc[n-m]%mod;
	return fz*fm%mod;
}
int n;
int ans;
int dp[N];
signed main(){
	// ios::sync_with_stdio(0);
	// cin.tie(0);
	// cout.tie(0);
	init(N-10);
	cin>>n;
	for(int i=n-1;i<=2*n-1;i++){
		if((i-n+1)%2)continue;
		int A=(i-(n-1))/2;
		int B=(n-1)+(i-(n-1))/2;
		ans+=C(i,A)-C(i,B+1);
		ans=(ans%mod+mod)%mod;
	}
	cout<<ans<<"\n";
	return 0;
}
/*
dp[i]=C(i,n)-dp[n]*C(i-n,(i-n)/2)-dp[n+2]*C(i-(n+2),i-(n+2)/2)-...
*/