N = gets.to_i

ans = Array.new(N) { Array.new(N, -1) }

1.upto(N) do |n|
  y = n - 1
  x = n - 1

  N.times do |i|
    ans[y][x] = n

    y = (y + 1) % N
    x = (x - 1) % N
  end
end

puts ans.map { |row| row.join(' ') }