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

int main()
{
	int N;
	cin >> N;

	vector<vector<int>> v( N, vector<int>( N ) );
	int r = 0;
	int x = 0;
	int y = 0;
	int n = 1;
	v[y][x] = n;
	for( int i = 0; i < N; i++ ) {
		for( int j = 0; j < N - r - 1; j++ ) {
			n++;
			x++;
			v[y][x] = n;
		}
		if( n >= N * N ) break;
		for( int j = 0; j < N - r - 1; j++ ) {
			n++;
			y++;
			v[y][x] = n;
		}
		if( n >= N * N ) break;
		for( int j = 0; j < N - r - 1; j++ ) {
			n++;
			x--;
			v[y][x] = n;
		}
		if( n >= N * N ) break;
		for( int j = 0; j < N - r - 2; j++ ) {
			n++;
			y--;
			v[y][x] = n;
		}
		if( n >= N * N ) break;
		n++;
		x++;
		v[y][x] = n;
		if( n >= N * N ) break;
		r += 2;
	}

	for( int i = 0; i < N; i++ ) {
		for( int j = 0; j < N; j++ ) {
			char c[16];
			sprintf( c, "%03d", v[i][j] );
			if( j ) cout << " ";
			cout << c;
		}
		cout << endl;
	}
}