#include <bits/stdc++.h>

//const static double	de_PI	= 3.14159265358979323846;
//const static int	de_MOD	= 1000000007;
//const static int	de_MAX	= 999999999;
//const static int	de_MIN = -999999999;

int main(void) {

	//std::ifstream in("123.txt");	std::cin.rdbuf(in.rdbuf());

	int N = 0;
	std::cin >> N;

	std::vector<std::vector<int>> A(N, std::vector<int>(N));

	int num = 1, i = 0, j = 0, count = 0;
	while (1) {
		i = j = count;
		for (; j < N - count; j++) {
			A[i][j] = num;
			num++;
		}
		if (num > N*N) { break; }
		i++; j--;
		for (; i < N - count; i++) {
			A[i][j] = num;
			num++;
		}
		if (num > N*N) { break; }
		j--; i--;
		for (; j >= count; j--) {
			A[i][j] = num;
			num++;
		}
		if (num > N*N) { break; }
		i--; j++;
		for (; i >= count + 1; i--) {
			A[i][j] = num;
			num++;
		}
		if (num > N*N) { break; }
		count++;
	}

	for (i = 0; i < N; i++) {
		for (j = 0; j < N - 1; j++) {
			std::cout << std::setw(3) << std::setfill('0') << A[i][j] << " ";
		}
		std::cout << std::setw(3) << std::setfill('0') << A[i][N - 1] << std::endl;
	}
}