Negative Fibonacci :) Dec 11, 2015 • {"login" => "77minds", "email" => "77minds@gmail.com", "display_name" => "Karthikeyan", "first_name" => "", "last_name" => ""} ....... 21,-13, 8, -5, 3, -2, 1, -1, 0, 1, 1, 2, 3, 5, 8, 13, 21 ......