using System;
using System.Linq;

namespace No401{
    public class Program{
        public static void Main(string[] args){
            var N = int.Parse(Console.ReadLine());
            var res = new int[N, N].ToJaggedArray();

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

            for(var i = 1; i <= N * N; i++){
                res[y][x] = i;
                if(!isInside(x + dx[d], y + dy[d]) || res[y + dy[d]][x + dx[d]] != 0)  d = (d + 1) % 4;
                x += dx[d];
                y += dy[d];
            }

            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;
        }
    }
}