#include <iostream>

using namespace std;

int main()
{
    int A[101][101],n,x=1;
    cin>>n;
    for(int i=1;i<=n;i++)
        for(int j=1;i+j<=n+1;j++)
            if(i+j==n+1) A[i][j]=0;
            else A[i][j]=A[n+1-j][n+1-i]=x++;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
            cout<<A[i][j]<<" ";
        cout<<endl;
    }
    return 0;
}