#include <iostream>
#include <iomanip>
using namespace std;

bool inside(int32_t a, int32_t b, int32_t alim, int32_t blim){
	return 0 <= a && a < alim && 0 <= b && b < blim;
}

int main(){
	int32_t n;
	cin >> n;
	int32_t arr[n][n], dd[] = {0, 1, 0, -1, 0};
	bool done[n][n]{};
	for(int32_t p = 1, h = 0, w = 0, d = 0; p <= n * n; p++){
		arr[h][w] = p;
		done[h][w] = true;
		if(inside(h + dd[d], w + dd[d + 1], n, n) && !done[h + dd[d]][w + dd[d + 1]]){
			h += dd[d];
			w += dd[d + 1];
		}else{
			d++;
			d %= 4;
			h += dd[d];
			w += dd[d + 1];
		}
	}
	for(int32_t i = 0; i < n; i++){
		for(int32_t j = 0; j < n; j++) cout << setw(3) << setfill('0') << arr[i][j] << ' ';
		cout << endl;
	}
}