#include<bits/stdc++.h>
using namespace std;
int a[1145][514],n,x,y,s=0;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		x=(n-i+1),y=0;
		for(int j=1;j<=i;j++){
			y++;
			a[x][y]=++s;
			//cout<<x<<" "<<y<<" "<<s<<" ";
		}
		//cout<<"\n";
		for(int k=1;k<i;k++){
			x++;
			a[x][y]=++s;
			//cout<<x<<" "<<y<<" "<<s<<" ";
		}
		//cout<<"\n";
	}
	//cout<<"\n\n\n";
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cout<<setw(4)<<a[i][j];
		}
		cout<<"\n";
	}
	
	return 0;
}