12 Days of Christmas
308
99 Bottles of Beer
363
Abundant Numbers
425
602547
Arabic to Roman
208
Christmas Trees
559
Divisors
673509
Emirp Numbers
439
Evil Numbers
510
Fibonacci
846689
Fizz Buzz
511598862607
Foo Fizz Buzz Bar
739
Happy Numbers
518
Happy Numbers (Long)
624
Leap Years
652
Leyland Numbers
468
Look and Say
461
Niven Numbers
799
Odious Numbers
509
Pernicious Numbers
380
Prime Numbers
688
Prime Numbers (Long)
738
Recamán
555
Smith Numbers
431
Van Eck Sequence
388