12 Days of Christmas
669
99 Bottles of Beer
636
Abundant Numbers
456
628572
Arabic to Roman
292
Christmas Trees
642
Divisors
710509
Emirp Numbers
542
Evil Numbers
510
Fibonacci
846689
Fizz Buzz
513600945609
Foo Fizz Buzz Bar
930
Happy Numbers
667
Happy Numbers (Long)
736
Leap Years
652
Leyland Numbers
550
Look and Say
567
Niven Numbers
802
Odious Numbers
509
Pernicious Numbers
380
Prime Numbers
688
Prime Numbers (Long)
738
Recamán
615
Smith Numbers
586
Van Eck Sequence
410