import java.io.*;
import java.util.*;


public class Main_yukicoder401 {

    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	Printer pr = new Printer(System.out);

    	int[] dx = {1, 0, -1, 0};
    	int[] dy = {0, 1, 0, -1};

    	int n = sc.nextInt();

    	int[][] ret = new int[n][n];
    	int d = 0;
    	int x = 0;
    	int y = 0;
    	for (int i = 0; i < n * n; i++) {
    		ret[y][x] = i + 1;

    		int nx = x + dx[d];
    		int ny = y + dy[d];
    		if (ny >= n || nx >= n || nx < 0 || ny < 0 || ret[ny][nx] > 0) {
    			d = (d + 1) % 4;
        		nx = x + dx[d];
        		ny = y + dy[d];
    		}
    		x = nx;
    		y = ny;
    	}

    	for (int i = 0; i < n; i++) {
    		for (int j = 0; j < n; j++) {
    			if (j > 0) {
    				pr.print(" ");
    			}
    			pr.printf("%03d", ret[i][j]);
    		}
    		pr.println();
    	}

        pr.close();
        sc.close();
    }

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;
		Iterator<String> it;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		String next() throws RuntimeException  {
			try {
				if (it == null || !it.hasNext()) {
//					it = Arrays.asList(br.readLine().split(" ")).iterator();
					it = Arrays.asList(br.readLine().split("\\p{javaWhitespace}+")).iterator();
				}
				return it.next();
			} catch (IOException e) {
				throw new IllegalStateException();
			}
		}

		int nextInt() throws RuntimeException {
			return Integer.parseInt(next());
		}

		long nextLong() throws RuntimeException {
			return Long.parseLong(next());
		}

		float nextFloat() throws RuntimeException {
			return Float.parseFloat(next());
		}

		double nextDouble() throws RuntimeException {
			return Double.parseDouble(next());
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new IllegalStateException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}