12 Days of Christmas
868
Collatz
897
Divisors
833
Evil Numbers
535
Fibonacci
786
Fizz Buzz
987
Foo Fizz Buzz Bar
873
Happy Numbers
620
Happy Numbers (Long)
741
Kolakoski Sequence
536
Leap Years
907
Leyland Numbers
681
Look and Say
866
Niven Numbers
920
Pascal’s Triangle
730
Pernicious Numbers
434
Prime Numbers
895
Quine
864
Recamán
737
Tongue-twisters
511