#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

const int DY[] = {-1,0,1,0};
const int DX[] = {0,1,0,-1};

int main(){
    int N;
    while(cin >> N){
        vector<vi> ans(N, vi(N));

        int y = 0, x = 0, d = 1;
        rep(i, N*N){
            ans[y][x] = i + 1;
            int ny = y + DY[d], nx = x + DX[d];
            if(ny < 0 || nx < 0 || ny >= N || nx >= N || ans[ny][nx]){
                d = (d + 1) % 4;
                ny = y + DY[d];
                nx = x + DX[d];
            } 
            {
                y = ny;
                x = nx;
            }
        }
        rep(yy, N){
            rep(xx, N)printf("%03d%c", ans[yy][xx], xx != N - 1 ? ' ' : '\n');
        }
    }
}