utopian tree example

utopiantree.rb

#!/usr/bin/ruby

class Utopiantree

  def cycle n

    size = 1

    if n > 0 
      for val in 0..n-1
        if val % 2 == 0
          size = size * 2
        else
          size = size + 1
        end
      end
    end
    size
  end

end

p = Utopiantree.new

t = gets.to_i
for val in 1..t
  p p.cycle gets.to_i
end