12 Days of Christmas
99 Bottles of Beer
Abundant Numbers
Arabic to Roman
Day of Week
Divisors
Emirp Numbers
Evil Numbers
Evil Numbers (Long)
Fibonacci
Fizz Buzz
6th
25th
19th
283rd
388th
103rd
56th
37th
24th
52nd
12th
9th
4th
161st
728th
60th
Foo Fizz Buzz Bar
Fractions
Happy Numbers
Kolakoski Constant
Leap Years
ln 2
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Prime Numbers
Prime Numbers (Long)
Quine
Roman to Arabic
Spelling Numbers
Tongue-twisters
Van Eck Sequence
π
φ