import java.util.Scanner;
public class mysnakematrix {
	private int n;
	//
	private int a[][];
	// 聲明一個矩陣
	private int value = 1;
	// 矩陣里數(shù)字的值
	public mysnakematrix(int i) {
		this.n = i;
		a = new int[n][n];
	}
	// 計算第m層左上角的數(shù)字
	private int getcorner(int m) {
		int corner = 1;
		int o = n - 1;
		for (int i = 0; i < m - 1; ++i) {
			corner += 4 * o;
			o = o - 2;
		}
		return corner;
	}
	// 生成矩陣的每一層的每一邊的數(shù)
	// s表示4個方向，分別取值1,2,3,4，表示4個不同的方向。
	// o表示這條邊的起始值。
	// x表示第m層每條邊的數(shù)字個數(shù)
	private void side(int s, int o, int x, int m) {
		int i = 0;
		int j = 0;
		switch (s) {
			case 1:
			      i = m - 1;
			j = m - 1;
			for (int k = 0; k < x; ++k) {
				a[i][j + k] = value;
				++value;
			}
			break;
			case 2:
			      i = m - 1;
			j = m - 1 + x;
			for (int k = 0; k < x; ++k) {
				a[i + k][j] = value;
				++value;
			}
			break;
			case 3:
			      i = m - 1 + x;
			j = m - 1 + x;
			for (int k = 0; k < x; ++k) {
				a[i][j - k] = value;
				++value;
			}
			break;
			case 4:
			      i = m - 1 + x;
			j = m - 1;
			for (int k = 0; k < x; ++k) {
				a[i - k][j] = value;
				++value;
			}
			break;
		}
	}
	// 生成蛇形矩陣的第m層
	private void shell(int m)// m表示第m層
	{
		int x = n - 1 - (m - 1) * 2;
		// x表示第m層每條邊的數(shù)字個數(shù)
		int o = getcorner(m);
		int o1 = o;
		int o2 = o1 + x;
		int o3 = o2 + x;
		int o4 = o3 + x;
		// System.out.println(o4);
		side(1, o, x, m);
		side(2, o, x, m);
		side(3, o, x, m);
		side(4, o, x, m);
	}
	// 生成蛇形矩陣
	public void snakeMatrix() {
		int m = (n + 1) / 2;
		// 計算一共有多少層
		for (int i = 1; i <= m; ++i) {
			shell(i);
		}
		if (n % 2 == 1) {
			a[n / 2][n / 2] = n * n;
		}
	}
	// 打印矩陣
	public void print() {
		for (int i = 0; i < n; ++i) {
			for (int j = 0; j < n; ++j) {
				if (a[i][j] < 10) {
					System.out.print(a[i][j] + " ");
				} else {
					System.out.print(a[i][j] + " ");
				}
			}
			System.out.println();
		}
	}
	public static void main(String args[]) {
		mysnakematrix my = new mysnakematrix(new Scanner(System.in).nextint());
		//利用Scanner獲取控制臺輸入
		my.snakeMatrix();
		my.print();
	}
}