12 Days of Christmas
867Collatz
915Divisors
840Evil Numbers
536Fibonacci
789Fizz Buzz
988Foo Fizz Buzz Bar
871Happy Numbers
624Happy Numbers (Long)
745Kolakoski Sequence
534Leap Years
933Leyland Numbers
698Look and Say
874Niven Numbers
927Pascal’s Triangle
733Pernicious Numbers
438Prime Numbers
896Quine
865Recamán
746Tongue-twisters
510