#include using namespace std; const int N = 1e5 + 10;

int a[110][110],n,x,y,cnt = 1;

int main(){ cin>>n; a[1][1] = 1; x = 2; y = 1;

while(cnt < n * n)
{
	while(x >= 1 && y <= n){
		a[x][y] = ++cnt;
		x--;y++;
	}
	if(x == 0 && y <= n){
		x++;
	}
	else
	{
		x+=2;
		y--;
	}
	while(y >= 1 && x <= n){
		a[x][y] = ++cnt;
		x++;y--; 
	}
	
	if(y==0 && x <= n){
		y++;
	}
	else
	{
		x--;y+=2;
	}
}

for(int i =1;i<=n;i++)
{
	for(int j=1;j<=n;j++)
	cout<<a[i][j]<<" ";
	cout<<endl;
}

return 0;

}