Abundant Numbers
827
Arithmetic Numbers
792
Catalan Numbers
637
Collatz
913331783
Divisors
709
Evil Numbers
608
Fibonacci
576
Fizz Buzz
635
Foo Fizz Buzz Bar
656
Happy Numbers
605
Intersection
685
Kaprekar Numbers
665
Leap Years
849
Niven Numbers
643
Niven Numbers (Long)
270
Odious Numbers
626
Recamán
450