def calc_nums(row)
  return [1] if row == 1

  temp = [1] # the current row
  rev  = calc_nums(row - 1)

  1.upto(row-2) do |i|
    temp[i] = rev[i - 1] + rev[i]
  end

  temp << 1
  temp
end

puts "What row do you want to see?"
rowNum = gets.chomp.to_i # chomp off newline and convert to int
puts "Here is row #{rowNum}:" # confirm
nums = calc_nums rowNum # convert to integer then pass
puts nums.join(" ")