#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using VI = vector<int>;
using VL = vector<ll>;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define allpt(v) (v).begin(), (v).end()
#define allpt_c(v) (v).cbegin(), (v).cend()
#define allpt_r(v) (v).rbegin(), (v).rend()


const int mod = 1e9 + 7;
const string wsp = " ";
const string tb = "\t";
const string rt = "\n";

template <typename T>
void show1dvec(vector<T> v)
{
    if (v.size() == 0)
        return;
    int n = v.size() - 1;
    rep(i, n) cout << v[i] << wsp;
    cout << v[n] << rt;
    return;
}

template <typename T>
void show2dvec(vector<vector<T>> v)
{
    int n = v.size();
    rep(i, n) show1dvec(v[i]);
}

string inttostr(int x)
{
    string ret;
    while(x > 0)
    {
        ret += (x % 10) + '0';
        x /= 10;
    }
    while(ret.length() < 3) ret += '0';
    reverse(allpt(ret));
    return ret;
}

int main()
{

#ifdef DEBUG
    cout << "DEBUG MODE" << endl;
    ifstream in("input.txt"); //for debug
    cin.rdbuf(in.rdbuf());    //for debug
#endif

    int n, c = 0, d = 0, direc[4][2] = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}};
    int py = 0, px = -1, dy = direc[d][0], dx = direc[d][1];
    cin >> n;
    vector<vector<string>> field(n, vector<string>(n, "000"));


    if (n == 1)
    {
        cout << "001" << rt;
        return 0;
    }

    while (true)
    {
        while (0 <= py + dy && py + dy < n && 0 <= px + dx && px + dx < n && field[py + dy][px + dx] == "000")
        {
            py += dy;
            px += dx;
            c++;
            field[py][px] = inttostr(c);
        }
        d = (d + 1) % 4;
        dy = direc[d][0], dx = direc[d][1];
        if (field[py + dy][px + dx] != "000") break;
    }

    show2dvec(field);

    return 0;
}