12 Days of Christmas
304
99 Bottles of Beer
364
Abundant Numbers
423
600543
Arabic to Roman
208
Christmas Trees
557
Divisors
657504
Emirp Numbers
438
Evil Numbers
509
Fibonacci
491
844687
Fizz Buzz
510591861606
Foo Fizz Buzz Bar
739
Happy Numbers
515
Happy Numbers (Long)
620
Leap Years
650
Leyland Numbers
464
Look and Say
458
Niven Numbers
795
Odious Numbers
507
Pernicious Numbers
378
Prime Numbers
688
Prime Numbers (Long)
737
Recamán
550
Smith Numbers
431
Van Eck Sequence
387