import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
       Scanner sc=new Scanner(System.in);
       int n=sc.nextInt();
        for(int i=0;i<2*n-1;i++){
            for(int j=0;j<2*n-1;j++){
                int top=i;
                int left=j;
                int bottom=(2*n-2)-i;
                int right=(2*n-2)-j;
                int value=Math.min(Math.min(top,bottom),Math.min(left,right));
                System.out.print(n-value);
            }
            System.out.println("");
        }
    }
}