12 Days of Christmas
655
99 Bottles of Beer
636
Abundant Numbers
452
624566
Arabic to Roman
292
Christmas Trees
638
Divisors
706504
Emirp Numbers
532
Evil Numbers
509
Fibonacci
501
844687
Fizz Buzz
510591941606
Foo Fizz Buzz Bar
927
Happy Numbers
664
Happy Numbers (Long)
731
Leap Years
650
Leyland Numbers
546
Look and Say
563
Niven Numbers
795
Odious Numbers
507
Pernicious Numbers
378
Prime Numbers
688
Prime Numbers (Long)
737
Recamán
610
Smith Numbers
586
Van Eck Sequence
408