12 Days of Christmas
86
99 Bottles of Beer
299
Arabic to Roman
963
Christmas Trees
127
Cubes
59
Diamonds
83
Divisors
626
Emirp Numbers
444
Evil Numbers
805
Fibonacci
806
Fizz Buzz
874
Fractions
703
Leap Years
633
Odious Numbers
804
Pernicious Numbers
731
Quine
939604
Sierpiński Triangle
184
Spelling Numbers
980
Tongue-twisters
468
λ
250