import java.util.*;
public class Square {
	
	public static void main(String[] args) {
		
		Scanner stdin = new Scanner(System.in);
		System.out.println("Enter n.");
		int n = stdin.nextInt();
		
		int[][] sqr = new int[2*n-1][2*n-1];
		
		for (int i=0; i<2*n-1; i++) {
			for (int j=0; j<2*n-1; j++) {
				int left = n - Math.abs(n-i-1);
				int up = n - Math.abs(n-j-1);
				sqr[i][j] = Math.min(left, up); 
			}
		}
		
		for (int i=0; i<2*n-1; i++) {
			for (int j=0; j<2*n-1; j++)
				System.out.print(sqr[i][j]+"\t");
			System.out.println();
		}
	}
}