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
4,895th
2,730th
9,802nd
5,877th
7,238th
5,063rd
10,010th
6,281st
7,832nd
5,422nd
1,150th
2,135th
6,806th
1,992nd
3,622nd
5,310th
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