#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 1; i < n; i += 2) printf("%d ", i);
  if (n & 1) printf("%d ", n);
  for (int i = n - 1 - !((n - 1) & 1); i > 0; i -= 2) printf("%d ", i);
  for (int i = 2; i < n; i += 2) printf("%d ", i);
  if (!(n & 1)) printf("%d ", n);
  for (int i = n - 1 - ((n - 1) & 1); i > 0; i -= 2) printf("%d ", i);
  printf("%d\n", n);
  return 0;
}
