#include <stdio.h>
int main()
{
	int n;
	scanf("%d", &n);
	int a[10][10];
	for (int q = 1; q <= n; q++)
	{
		for (int p = 1; p <= n; p++)
		{
			a[p][q] = 0;
		}
	}
	int k = 1;
	while (k <= n * n)
	{
		int x = 1;
		int y = 1;
		while (y <= n && a[x][y] == 0)
		{
			a[x][y] = k;
			y++;
			k++;
		}
		while (x <= n && a[x][y] == 0)
		{
			a[x][y] = k;
			x++;
			k++;
		}
		while (y >= 1 && a[x][y] == 0)
		{
			a[x][y] = k;
			y--;
			k++;
		}
		while (x >= 1 && a[x][y] == 0)
		{
			a[x][y] = k;
			x--;
			k++;
		}
	}
	for (int m = 1; m <= n; m++)
	{
		for (int z = 1; z <= n; z++)
		{
			printf(" %d ", a[m][z]);
		}
		printf("\n");
	}
	return 0;
}