package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Scan()
	n, _ := strconv.Atoi(sc.Text())
	board := [][]int{}
	for i := 0; i < n; i++ {
		board = append(board, make([]int, n))
	}
	dx, dy, x, y := 1, 0, -1, 0
	for i := 1; i <= n*n; i++ {
		nx, ny := x+dx, y+dy
		if nx < 0 || nx >= n || ny < 0 || ny >= n || board[ny][nx] != 0 {
			dx, dy = -dy, dx
			nx, ny = x+dx, y+dy
		}
		board[ny][nx] = i
		x, y = nx, ny
	}

	for _, r := range board {
		for j, c := range r {
			fmt.Printf("%03d", c)
			if j < n-1 {
				fmt.Print(" ")
			}
		}
		fmt.Println()
	}
}