Contents

class Integer
  def catalan
    (2*self).factorial / (succ.factorial * factorial)
  end

  def catalan?
    in_sequence?(seq: :catalan)
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
numb-0.186.0	lib/numb/catalan.rb
numb-0.185.0	lib/numb/catalan.rb
numb-0.184.0	lib/numb/catalan.rb
numb-0.181.0	lib/numb/catalan.rb
numb-0.170.0	lib/numb/catalan.rb