#include<bits/stdc++.h>
using  namespace std;
int main()
{
	int n,m=1,a[20][20];
	cin>>n;
	 	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
		{
			if(j+i<=n+1)
			a[i][j]=i+j-1;
			else
			a[i][j]=2*n-i-j+1;
		}
		
	 }
	 
	 
	 	 	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
		{
			cout<<setw(3)<<a[i][j];
		}
		cout<<endl;
	 }
	return 0;
} 
/**************************************************************
	Problem: 1193
	User: chenzhuo1
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/