12 Days of Christmas
80
Abundant Numbers
477
Arabic to Roman
362
Collatz
707
Divisors
771
Emirp Numbers
365
Evil Numbers
836
Evil Numbers (Long)
816
Fibonacci
935
Fizz Buzz
348
Foo Fizz Buzz Bar
516
Fractions
415
Happy Numbers
396
Happy Numbers (Long)
427
Leap Years
744743
Niven Numbers
720
Niven Numbers (Long)
787
Odious Numbers
800
Odious Numbers (Long)
782
Pascal’s Triangle
800
Pernicious Numbers
349
Prime Numbers
689
Recamán
544
Smith Numbers
539
Van Eck Sequence
474
π
56
τ
56
φ
744750