// yukicoder: No.401 数字の渦巻き
// 2019.4.15 bal4u

#include <stdio.h>

int map[32][32];
int mv[4][2] = { {-1,0},{0,1},{1,0},{0,-1} };

int main()
{
	int i, k, r, c, d, rr, cc, N;

	scanf("%d", &N);
	r = c = 0, d = 1, map[0][0] = 1;
	k = 2; for (i = 0; i < 2; ) {
		rr = r + mv[d][0], cc = c + mv[d][1];
		if (rr < 0 || rr >= N || cc < 0 || cc >= N
			|| map[rr][cc] > 0) {
			d++; if (d >= 4) d = 0;
			i++;
			continue;
		}
		map[rr][cc] = k++;
		r = rr, c = cc, i = 0;
	}
	for (r = 0; r < N; r++) {
		printf("%03d", map[r][0]);
		for (c = 1; c < N; c++) printf(" %03d", map[r][c]);
		putchar('\n');
	}
	return 0;
}