using System;
using System.Linq;

namespace Uzumaki {
    public class Program {
        public static void Main(string[] args) {
            var N = int.Parse(Console.ReadLine());
            var res = new int[N, N].ToJaggedArray();
            res[0][0] = 1;

            Func<int, int, bool> isInside = (tx, ty) => 0 <= tx && tx < N && 0 <= ty && ty < N;
            var d = 0;
            var dx = new[] { 1, 0, -1, 0 };
            var dy = new[] { 0, 1, 0, -1 };
            var x = 0;
            var y = 0;

            for(var i = 2; i <= N * N; i++) {
                for(var j = 0; j < 2; j++, d++) {
                    var nx = x + dx[d % 4];
                    var ny = y + dy[d % 4];

                    if(isInside(nx, ny) && res[ny][nx] == 0) {
                        res[y = ny][x = nx] = i;
                        break;
                    }
                }
            }

            foreach(var r in res) {
                Console.WriteLine(string.Join(" ", r.Select(i => i.ToString("000"))));
            }
        }
    }

    public static class ExMethod {
        public static T[][] ToJaggedArray<T>(this T[,] src) {
            var x = src.GetLength(1);
            var y = src.GetLength(0);
            var ret = new T[y][];

            for(var i = 0; i < y; i++) {
                ret[i] = new T[x];
                for(var j = 0; j < x; j++) {
                    ret[i][j] = src[i, j];
                }
            }

            return ret;
        }
    }
}