#include <bits/stdc++.h>
using namespace std;
#define fastcin {\
    cin.tie(0);\
    ios::sync_with_stdio(false);\
}
#define rep(i, a, b) for(int i = a; i < b; i++)
#define rrep(i, a, b) for(int i = a; i >= b; i--)
typedef vector<int> vi;
typedef vector<vi> vvi;

int main() {
    fastcin;
    int n, c = 1, x = 0, y = 0;
    cin >> n;
    vvi b(n, vi(n));
    for(x; x<n; x++) {
        b[y][x] = c;
        c++;
    }
    x--;
    y++;
    char m[] = {'d', 'l', 'u', 'r'};
    int mn = 0;
    rrep(i, n-1, 1) {
        rep(j, 0, 2) {
            if(m[mn]=='d') {
                int tmp = y;
                for(y; y<i+tmp; y++) {
                    b[y][x] = c;
                    c++;
                }
                y--;
                x--;
                mn++;
            } else if(m[mn]=='l') {
                int tmp = x;
                for(x; x>tmp-i; x--) {
                    b[y][x] = c;
                    c++;
                }
                x++;
                y--;
                mn++;
            } else if(m[mn]=='u') {
                int tmp = y;
                for(y; y>tmp-i; y--) {
                    b[y][x] = c;
                    c++;
                }
                y++;
                x++;
                mn++;
            } else if(m[mn]=='r') {
                int tmp = x;
                for(x; x<i+tmp; x++) {
                    b[y][x] = c;
                    c++;
                }
                x--;
                y++;
                mn = 0;
            }
        }
    }
    rep(i, 0, n) {
        rep(j, 0, n) {
            printf("%03d ", b[i][j]);
        }
        printf("\n");
    }
    return 0;
}