#!/bin/bash

function die(){ echo $@ && exit -1; }

if [ $# -ne 1 ]; then die "zadej 1 parametr"; fi
let n=$1
if ! ((n&1)); then die "parametr musi byt lichy"; fi
let "m=n>>1"

while let "y < n"; do
  let "c=m>y?y:n-y-1"
  d=0; while let "d < c"; do
    let "cur=((n-(d<<1))*(n-(d<<1)-1)-y+1+d++)"
    printf "%3d " $cur
  done
  d=1; while let "d <= (n-(c<<1))"; do
    let "cur=((n-(c<<1))*(n-(c<<1)-1)+(m>y?d++:(-((m-1-c)<<1)-d++)))"
    printf "%3d " $cur
  done
  d=0; while let "d < c"; do
    let "cur=((n-((c-d)<<1))*(n-((c-d)<<1))-((c-d-1)<<1)+y-1+c-d++)"
    printf "%3d " $cur
  done
  printf "\n"
  let y++
done