#include<iostream>
using namespace std;
int a[21][21];
int main()
{
    int i,j,n,par=2,impar=1;
    cin>>n;
    n=2*n;
    for(i=1;i<=n;i++)
    {
        if(i%2!=0)
        {
            for(j=1;j<=n;j++)
            {
                a[i][j]=impar;
                impar=impar+2;
            }
        }
        else
        {
            for(j=n;j>=1;j--)
            {
                a[i][j]=par;
                par=par+2;
            }
        }
    }
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            cout<<a[i][j]<<" ";
        }
        cout<<endl;
    }
    return 0;
}
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