#include<stdio.h>

typedef long long int ln;

void run(void){
  ln ans=1;
  const int mod=1000000007;
  int n;
  scanf("%d",&n);
  n*=2;
  ln m=(ln)n*(n-1)/2;
  int sub=2*n-3;
  while(sub>=1){
    ans=m%mod*ans%mod;
    m=m-sub;
    sub-=4;
  }
  printf("%lld\n",ans);
  return;
}

int main(void){
  run();
  return 0;
}