import java.util.Scanner;
public class Main {
		static int INF = 2 << 27;
		public static void main(String[] args) {
			Scanner sc = new Scanner(System.in);
			int N = sc.nextInt();
			int[][] map = new int[N][N];
			int x = 0;
			int y = 0;
			int v = 0;
			int[] vx = {1,0,-1,0};
			int[] vy = {0,1,0,-1};
			for(int i = 1; i <= N * N; i++) {
				map[y][x] = i;
				int tx = x + vx[v];
				int ty = y + vy[v];
				if(ty < 0 || tx < 0 || ty >= map.length || tx >= map[ty].length || map[ty][tx] != 0) v = (v + 1) % 4;
				x = x + vx[v];
				y = y + vy[v];
				
			}
			for(int i = 0; i < N; i++) {
				System.out.printf("%03d", map[i][0]);
				for(int j = 1; j < N; j++) {
					System.out.printf(" %03d", map[i][j]);
				}
				System.out.println();
			}
			
		}
		

}