#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
    int N;
    cin>>N;
    vector<vector<int>> A(N,vector<int>(N,-1));
    int now = 1;
    for(int i=0;i<N;i+=2){
    	int x = i, y = i;
    	bool p = true;
    	while(now <= 4*(i/2+1)*N-(4*(i/2+1)*(i/2+1))){
    		A[x][y] = now;
    		now++;
    		if(p){
    			if(x <= y){
    				if(y != 0 && A[x][y-1] == -1) y--;
    				else if(y != N-1 && A[x][y+1] == -1) y++;
    				else x++;
    			}
    			else{
    				//cout<<x<<' '<<y<<endl;
    				if(x != 0 && A[x-1][y] == -1) x--;
    				else if(x != N-1 && A[x+1][y] == -1) x++;
    				else y++;
    			}
    		}
    		else swap(x,y);
    		p ^= 1;
    	}
    }
    A[N-1][N-1] = N*N;
    for(int i=0;i<N;i++){
    	for(int x:A[i]) cout<<x<<' ';
    	cout<<endl;
    }
}