12 Days of Christmas
80
Abundant Numbers
485
Arabic to Roman
370
Collatz
722
Divisors
783
Emirp Numbers
372
Evil Numbers
851
Evil Numbers (Long)
837
Fibonacci
947
Fizz Buzz
351
Foo Fizz Buzz Bar
524
Fractions
428
Happy Numbers
403
Happy Numbers (Long)
439
Leap Years
759754
Niven Numbers
733
Niven Numbers (Long)
806
Odious Numbers
816
Odious Numbers (Long)
804
Pascal’s Triangle
820
Pernicious Numbers
357
Prime Numbers
702
Recamán
556
Smith Numbers
555
Van Eck Sequence
491
π
57
τ
57
φ
1234951