#include<stdio.h>
int a[1003][1003];
int main()
{
	int n;
	scanf("%d", &n);
	int i, j, k;
	for (i = 0; i < n; i++)
		for (j = 0; j < n; j++)
			a[i][j] = -1;
	int next;
	if (n % 2 > 0)
	{
		a[0][0] = 1;
		next = 2;
		for (k = 1; k < n - 1; k += 2)
		{
			a[k][k - 1] = next;
			next++;
			i = k;
			j = k - 1;
			for (;;)
			{
				if (next % 2 == 0)
				{
					if (i == k)
					{
						if (a[i + 1][j] < 0)
						{
							i++;
							a[i][j] = next;
							next++;
						}
						else
						{
							j--;
							a[i][j] = next;
							next++;
						}
					}
					else if (j == k)
					{
						if (a[i][j + 1] < 0)
						{
							j++;
							a[i][j] = next;
							next++;
						}
						else
						{
							i--;
							a[i][j] = next;
							next++;
						}
					}
					else if (i == k + 1)
					{
						if (a[i - 1][j] < 0)
						{
							i--;
							a[i][j] = next;
							next++;
						}
						else if (j > 0)
						{
							j--;
							a[i][j] = next;
							next++;
						}
						else
							break;
					}
					else
					{
						if (a[i][j - 1] < 0)
						{
							j--;
							a[i][j] = next;
							next++;
						}
						else
						{
							i--;
							a[i][j] = next;
							next++;
						}
					}
				}
				else
				{
					i ^= j;
					j ^= i;
					i ^= j;
					a[i][j] = next;
					next++;
				}
			}
			a[k + 1][k] = next;
			next++;
			a[k][k + 1] = next;
			next++;
			a[k][k] = next;
			next++;
			a[k + 1][k + 1] = next;
			next++;
		}
	}
	else
	{
		a[0][0] = 1;
		a[1][0] = 2;
		a[0][1] = 3;
		a[1][1] = 4;
		next = 5;
		for (k = 2; k < n - 1; k++)
		{
			a[k][k] = next;
			next++;
			i = j = k;
			for (;;)
			{
				if (i == k)
				{
					if (a[j][i] < 0)
					{
						i ^= j;
						j ^= i;
						i ^= j;
						a[i][j] = next;
						next++;
					}
					else if (j > 0)
					{
						j--;
						a[i][j] = next;
						next++;
					}
					else
						break;
				}
				else
				{
					if (a[j][i] < 0)
					{
						i ^= j;
						j ^= i;
						i ^= j;
						a[i][j] = next;
						next++;
					}
					else
					{
						i--;
						a[i][j] = next;
						next++;
					}
				}
			}
			i++;
			a[i][j] = next;
			next++;
			k++;
			for (;;)
			{
				if (i == k)
				{
					if (a[j][i] < 0)
					{
						i ^= j;
						j ^= i;
						i ^= j;
						a[i][j] = next;
						next++;
					}
					else if (j < k)
					{
						j++;
						a[i][j] = next;
						next++;
					}
					else
						break;
				}
				else
				{
					if (a[j][i] < 0)
					{
						i ^= j;
						j ^= i;
						i ^= j;
						a[i][j] = next;
						next++;
					}
					else
					{
						i++;
						a[i][j] = next;
						next++;
					}
				}
			}
		}
	}
	for (i = 0; i < n; i++)
	{
		for (j = 0; j < n - 1; j++)
			printf("%d ", a[i][j]);
		printf("%d\n", a[i][j]);
	}
	return 0;
}