import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		int board[][]=new int[n][n];
		board[0][0]=1;
		int move[][]={{1,0},{0,1},{-1,0},{0,-1}};
		int nx=0;
		int ny=0;
		int direction=0;
		for(int i=2;i<=n*n;i++){
			int nnx=nx+move[direction%4][0];
			int nny=ny+move[direction%4][1];
			if(nnx<0||nnx>=n||nny<0||nny>=n){
				direction++;
			}else if(board[nnx][nny]!=0){
				direction++;
			}
			nx+=move[direction%4][0];
			ny+=move[direction%4][1];
			board[nx][ny]=i;
		}
		
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				System.out.printf("%03d ",board[j][i]);
			}
			System.out.println();
		}
	}
}