package yukicoder;

import java.util.Scanner;

public class N401
{

	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int drc=0;
		int now=1;
		int i=0,j=0;
		int[][] h=new int[N][N];

		for(int k=0;k<N;k++)
			for(int l=0;l<N;l++)
			{
				h[k][l]=0;
			}
		h[0][0]=1;

		while(now!=N*N)
		{
			switch (drc%4)
			{
				case 0:
					while(j+1<N&&h[i][j+1]==0)
					{
						h[i][++j]=++now;
						//System.out.println("h["+i+"]["+j+"]="+now);
					}
					drc++;
					break;
				case 1:
					while(i+1<N&&h[i+1][j]==0)
					{
						h[++i][j]=++now;
						//System.out.println("h["+i+"]["+j+"]="+now);
					}
					drc++;
					break;
				case 2:
					while(0<=j-1&&h[i][j-1]==0)
					{
						h[i][--j]=++now;
						//System.out.println("h["+i+"]["+j+"]="+now);
					}
					drc++;
					break;
				case 3:
					while(0<=i-1&&h[i-1][j]==0)
					{
						h[--i][j]=++now;
						//System.out.println("h["+i+"]["+j+"]="+now);
					}
					drc++;
					break;

			}
		}


		for(int ii=0;ii<N;ii++)
		{
			for(int jj=0;jj<N;jj++)
			{
				if(h[ii][jj]<=9)
				{
					System.out.printf("00%d",h[ii][jj]);
				}
				else if(10<=h[ii][jj]&&h[ii][jj]<=99)
				{
					System.out.printf("0%d",h[ii][jj]);
				}
				else if(100<=h[ii][jj])
				{
					System.out.printf("%d",h[ii][jj]);
				}

				if(jj==N-1){System.out.println();}
				else{System.out.print(" ");}
			}
		}


	}

}