{}
import java.util.*;
class Pattern{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("enter the no. of row=");
int n=sc.nextInt();
for(int i=1; i<=2*n-1; i++){
for(int j=1; j<=2*n-1; j++){
int a=i,b=j;
if(i>n)
a =2*n-i;
if(j>n)
b=2*n-j;
System.out.print(n+1-Math.min(a,b)+" ");
}
System.out.println();
}
}
}