#include<iomanip>
#include<cmath>
#include<cstring>
using namespace std;
const int N=1e2+10;
const int INF=0x3f3f3f3f;
int a[N][N],n,x,y,num; 
int main()
{
	cin>>n;
	x=1,y=1;
	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;
}