12 Days of Christmas
669
99 Bottles of Beer
636
Abundant Numbers
463
639
570Arabic to Roman
292
Christmas Trees
702
Divisors
710
507Emirp Numbers
541
Evil Numbers
509
Fibonacci
845
686Fizz Buzz
512
599
944
608Foo Fizz Buzz Bar
929
Happy Numbers
666
Happy Numbers (Long)
734
Leap Years
651
Leyland Numbers
549
Look and Say
565
Niven Numbers
801
Odious Numbers
508
Pernicious Numbers
379
Prime Numbers
688
Prime Numbers (Long)
736
RecamΓ‘n
623
Smith Numbers
584
Van Eck Sequence
408