#include <iostream>
using namespace std;
int a[105][105],h,k=1,l,b=2,hy=0;
int main(){
    int n;
    cin >> n;
    h=n-1;
    for (int i = 0; i <= n-1; i++) {
        h = n - hy;
        l = 1;
        for (; l != b;) {
            a[h][l] = k++;
            l++;
        }
        l--;
        for (; h != n;) {
            h++;
            a[h][l] = k++;
        }
        b++;
        hy++;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            printf("%4d", a[i][j]);
        }
        cout << "\n";
    }
}