#include <bits/stdc++.h>
using namespace std;

int sum[25][25] = {};
int main(){
	memset(sum,-1,sizeof(sum));
	int n;
	cin >> n;
	int x = 1;
	int y = 0;
	int c = 0;
	
	while(c<n*n){
		sum[y][x] = ++c;
		x++;
		y--;
		x = (x+n)%n;
		y = (y+n)%n;
		if( sum[y][x] != -1 ){
			--x;
			y++;
			y++;
			x = (x+n)%n;
			y = (y+n)%n;
		}
	}
	for(int i = 0 ; i < n ; i++){
		for(int j = 0 ; j < n ; j++) cout << sum[i][j] << " \n"[j+1==n];
	}
}