import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class Main {

    static BufferedReader in;
    static PrintWriter out;
    static StringTokenizer tok;

    void solve() throws IOException {
        n = ni();

        boolean[][] used = new boolean[n][n];
        int[][] ans = new int[n][n];

        int x = 0;
        int y = 0;
        int mode = 0;

        for (int i = 1; i <= n * n; i++) {
            ans[x][y] = i;
            used[x][y] = true;

            if (!isin(x + dx[mode], y + dy[mode]) || used[x + dx[mode]][y + dy[mode]]) {
                mode = (mode + 1) % 4;
            }

            x += dx[mode];
            y += dy[mode];
        }

        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (j > 0) out.print(" ");
                out.print(String.format("%03d", ans[i][j]));
            }
            out.println();
        }
    }

    int n;

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

    boolean isin(int x, int y) {
        return 0 <= x && x <= n - 1 && 0 <= y && y <= n - 1;
    }

    String ns() throws IOException {
        while (!tok.hasMoreTokens()) {
            tok = new StringTokenizer(in.readLine(), " ");
        }
        return tok.nextToken();
    }

    int ni() throws IOException {
        return Integer.parseInt(ns());
    }

    long nl() throws IOException {
        return Long.parseLong(ns());
    }

    double nd() throws IOException {
        return Double.parseDouble(ns());
    }

    String[] nsa(int n) throws IOException {
        String[] res = new String[n];
        for (int i = 0; i < n; i++) {
            res[i] = ns();
        }
        return res;
    }

    int[] nia(int n) throws IOException {
        int[] res = new int[n];
        for (int i = 0; i < n; i++) {
            res[i] = ni();
        }
        return res;
    }

    long[] nla(int n) throws IOException {
        long[] res = new long[n];
        for (int i = 0; i < n; i++) {
            res[i] = nl();
        }
        return res;
    }

    public static void main(String[] args) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
        tok = new StringTokenizer("");
        Main main = new Main();
        main.solve();
        out.close();
    }
}