#include<stdio.h>
#include<iostream>
#include<algorithm>
#include<string>
#include<cmath>
#include<cstdio>
#include<cstring>
#include <iomanip>
using namespace std;

int main() {
	int n = 0, x = 1;
	int a[20][20];
	cin >> n;
	a[1][1] = 1;
	for (int i = 1; i <= n; i++) {//先右后左
		for (int j = 1; j <= i; j++) {//左 
			a[j][i] = x;//[1][n]到[n][n]
			x += 1;
		}
		for (int k = i - 1; k >= 1; k--) {//右
			a[i][k] = x;//[n][n]到[n][1]
			x += 1;
		}
	}
	for (int i = n; i >= 1; i--) {
		for (int j = 1; j <= n; j++) {
			cout << setw(4) << a[j][i] << " ";
		}
		cout << endl;
	}

	return 0;
}