#include <iostream>
#include <iomanip>
using namespace std;
int main() {
    int N;
    cin >> N; 
    int a[N][N];
    int k = 1; 
    int h = 0, l = 0;
    int hy = 0;
    for (int i = 0; i < N; i++) {
        h = N - hy; 
        l = 0; 
        for (; l != N; l++) { 
            a[h][l] = k++;
        }
        l--; 
        for (; h != N; h++) {
            a[h][l] = k++;
        }
        hy++; 
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout << setw(4) << a[i][j]; 
        }
        cout << endl; 
    }
    return 0;
}