Abundant Numbers
857
Arithmetic Numbers
818
Catalan Numbers
672
Collatz
947339831
Divisors
731
Evil Numbers
627
Fibonacci
589
Fizz Buzz
644
Foo Fizz Buzz Bar
675
Happy Numbers
654
Intersection
729
Kaprekar Numbers
711
Leap Years
870
Niven Numbers
667
Niven Numbers (Long)
279
Odious Numbers
649
Recamán
472