12 Days of Christmas
868
Collatz
919
Divisors
841
Evil Numbers
537
Fibonacci
790
Fizz Buzz
989
Foo Fizz Buzz Bar
873
Happy Numbers
625
Happy Numbers (Long)
749
Kolakoski Sequence
535
Leap Years
934
Leyland Numbers
690
Look and Say
877
Niven Numbers
929
Pascal’s Triangle
734
Pernicious Numbers
439
Prime Numbers
897
Quine
862
Recamán
748
Tongue-twisters
510