#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=1e3+10; 
const int INF=0x3f3f3f3f;
int n,a[N][N],x=1,y=1,num;
signed main()
{
	cin >> n;
	while(num<n*n)
	{
		while(y<=n&&a[x][y]==0)
		{
			a[x][y]=++num;
			y++;
		}
		x++,y--;
		while(x<=n&&a[x][y]==0)
		{
			a[x][y]=++num;
			x++;
		}
		x--,y--;
		while(y>=1&&a[x][y]==0)
		{
			a[x][y]=++num;
			y--;
		}
		x--,y++;
		while(x>=1&&a[x][y]==0)
		{
			a[x][y]=++num;
			x--;
		}
		x++,y++;
	}
	for(int i=1;i<=n;i++)
	{
		for (int j=1;j<=n;j++)
		{
			cout << a[i][j] << " ";
		}
		cout << endl;
	}
	return 0;
}