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

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

const ll mod = 1e9 + 7;
const ll inf = 1e18;

void vprint(vector<ll> A){
    ll L = A.size();
    FOR(i, 0, L){
        if(i) cout << ' ';
        cout << std::setfill('0') << std::right << std::setw(3) << A[i];
    }
    cout << endl;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll N;
    cin >> N;

    vector<vector<ll> > A(N, vector<ll>(N, 0));
    ll x = -1;
    ll y = 0;
    ll d = 0; // 0, 1, 2, 3
    ll id = 1;
    ll loop = 1000;
    while(loop--){
        ll tx = x;
        ll ty = y;
        if(d==0) tx++;
        else if(d==1) ty++;
        else if(d==2) tx--;
        else ty--;

        if(0<=tx && tx<N && 0<=ty && ty<N && A[ty][tx]==0){
            A[ty][tx] = id;
            id++;
            x = tx;
            y = ty;
        }else{
            d++;
            d %= 4;
        }
    }

    FOR(i, 0, N){
        vprint(A[i]);
    }
    
    return 0;
}