n = gets.chomp.to_i

result = Array.new()

n.times do
  result.push((1..n).to_a.map(&:to_i))
end

tl, rb = n-1, n

spn = 1

loop do
  (rb-1).times do | i |
    result[i+spn][n-spn] = result[i+spn-1][n-spn] + 1
  end

  (rb-1).times do | i |
    result[n-spn][n-spn-i-1] = result[n-spn][n-spn-i] + 1
  end

  (tl-1).times do | i |
    result[n-spn-i-1][spn-1] = result[n-spn-i][spn-1] + 1
  end

  (tl-1).times do | i |
    result[spn][i+spn] = result[spn][i+spn-1] + 1
  end

  tl-=2
  rb-=2
  if tl <= 0
    break
  end
  spn+=1
end


for re in result
  for r in re
    r = r.to_s
    if r.length == 1
      print "00#{r} "
    elsif r.length == 2
      print "0#{r} "
    else
      print "#{r} "
    end
  end
  print "\n"
end