12 Days of Christmas
643
99 Bottles of Beer
634
Abundant Numbers
452
624567
Arabic to Roman
292
Christmas Trees
638
Divisors
694504
Emirp Numbers
532
Evil Numbers
509
Fibonacci
502
844687
Fizz Buzz
510591941605
Foo Fizz Buzz Bar
925
Happy Numbers
664
Happy Numbers (Long)
731
Leap Years
650
Leyland Numbers
546
Look and Say
564
Niven Numbers
795
Odious Numbers
507
Pernicious Numbers
378
Prime Numbers
688
Prime Numbers (Long)
737
Recamán
610
Smith Numbers
584
Van Eck Sequence
408