#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
    int n;
    while(cin>>n)
    {
        int a[n][n]={ },i=n*n-1,v=n-1,h=n-1,dir=1;
        while(i>=0)
        {
            a[v][h]=i;
            i--;
            //cout << v << " " << h << " " << a[v][h] << endl;
            if(dir==1)
            {
                if(h-1<0||a[v][h-1]!=0)
                {
                    dir=2;
                    v--;
                }
                else h--;
            }
            else if(dir==2)
            {
                if(v-1<0||a[v-1][h]!=0)
                {
                    dir=3;
                    h++;
                }
                else v--;
            }
            else if(dir==3)
            {
                if(h+1>n-1||a[v][h+1]!=0)
                {
                    dir=4;
                    v++;
                }
                else h++;
            }
            else //if(dir==4)
            {
                if(v+1>n-1||a[v+1][h]!=0)
                {
                    dir=1;
                    h--;
                }
                else v++;
            }
        }

        for(int j=0;j<n;j++)
        {
            for(int k=0;k<n;k++)
                cout << setw(4) << a[j][k] ;
            cout<<endl;
        }
    }
}