12 Days of Christmas
674
99 Bottles of Beer
640
Abundant Numbers
473
638603
Arabic to Roman
300
Christmas Trees
653
Divisors
722538
Emirp Numbers
553
Evil Numbers
519
Fibonacci
857719
Fizz Buzz
522617951627
Foo Fizz Buzz Bar
943
Happy Numbers
681
Happy Numbers (Long)
758
Leap Years
662
Leyland Numbers
566
Look and Say
583
Niven Numbers
815
Odious Numbers
519
Pernicious Numbers
388
Prime Numbers
702
Prime Numbers (Long)
759
Recamán
629
Smith Numbers
608
Van Eck Sequence
424