#include <iostream>
using namespace std;
//Teri Nemcu
int main()
{
	int n;
	cin >> n;
	if (n % 2 == 0)
	{
		cout << "Není liché";
	}

	int radek = 1;
	for(int i = 1; radek<=(2*n-1); i++)
	{
		int min = i-1;
		if (radek-1 < min)
		{
			min = radek-1;
		}
		if (((2*n-1)-i) < min)
		{
			min = (2*n-1)-i;
		}
		if (((2*n-1)-radek) < min)
		{
			min = (2*n-1)-radek;
		}
		cout << min + 1 << " ";
		if(i == (2*n-1))
		{
			cout << "\n";
			radek++;
			i = 0;
		}
	}
}