12 Days of Christmas
669
99 Bottles of Beer
636
Abundant Numbers
456
627572
Arabic to Roman
291
Christmas Trees
642
Divisors
710508
Emirp Numbers
541
Evil Numbers
510
Fibonacci
845688
Fizz Buzz
513600944609
Foo Fizz Buzz Bar
930
Happy Numbers
667
Happy Numbers (Long)
735
Leap Years
652
Leyland Numbers
550
Look and Say
566
Niven Numbers
801
Odious Numbers
509
Pernicious Numbers
379
Prime Numbers
688
Prime Numbers (Long)
738
RecamΓ‘n
614
Smith Numbers
585
Van Eck Sequence
409