using System.IO;
using System;

class Program
{
    static void Main()
    {
        int size = Int32.Parse(Console.ReadLine());
        int[,] arr=new int[size,size];
        int count=1;
        for(int x=size;x>=0;x--)
        {
            int y=0;
            int xx=x;
            bool exc=false;
            while(!exc)
            {
                try
                {
                    arr[xx,y]=count;
                    count++;
                    xx++;
                    y++;
                }
                catch
                {
                    exc=true;
                    break;
                }
            }
        }

        for(int y=1;y<=size-1;y++)
        {
            int x=0;
            int yy=y;
            bool exc=false;
            while(!exc)
            {
                try
                {
                    arr[x,yy]=count;
                    count++;
                    x++;
                    yy++;
                }
                catch
                {
                    exc=true;
                    break;
                }
            }
        }

        for(int x=0;x<size;x++)
        {
            for(int y=0;y<size;y++)
            {
                Console.Write(arr[y,x]+" ");
            }
            Console.WriteLine();
        }

    }
}