import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.nextLine());
        for (int i =1; i<=N;i++){
            System.out.println("");
            for (int j = 1; j<=N;j++) {
                System.out.print(j+" ");
                for (int k = i-1; k >=1 ; k--) {
                    System.out.println(j+" ");
                    j++;

                }
            }
        }
    }
}