12 Days of Christmas
849Collatz
919Divisors
840Evil Numbers
536Fibonacci
789Fizz Buzz
991Foo Fizz Buzz Bar
878Happy Numbers
758Happy Numbers (Long)
748Kolakoski Sequence
533Leap Years
934Leyland Numbers
698Look and Say
874Niven Numbers
931Pascal’s Triangle
733Pernicious Numbers
438Prime Numbers
896Quine
865Recamán
748Tongue-twisters
771