Contents

class Integer
  def centered_pentagonal?
    n = self - 1
    n.divides?(5) and (n/5).triangular?
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
numb-0.152.0	lib/numb/centered_pentagonal.rb
numb-0.138.0	lib/numb/centered_pentagonal.rb
numb-0.125.0	lib/numb/centered_pentagonal.rb