12 Days of Christmas
167
Abundant Numbers
494
Arabic to Roman
507
Collatz
779
Divisors
809
Emirp Numbers
442
Evil Numbers
834
Evil Numbers (Long)
813
Fibonacci
932
Fizz Buzz
380
Foo Fizz Buzz Bar
646
Fractions
488
Happy Numbers
508
Happy Numbers (Long)
500
Leap Years
723742
Niven Numbers
716
Niven Numbers (Long)
780
Odious Numbers
797
Odious Numbers (Long)
779
Pascal’s Triangle
861
Pernicious Numbers
348
Prime Numbers
688
Recamán
598
Smith Numbers
729
Van Eck Sequence
499
π
63
τ
62
φ
754751