12 Days of Christmas
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arithmetic Numbers
Card Number Validation
Catalan’s Constant
Christmas Trees
CSS Colors
Cubes
Day of Week
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Fractions
Game of Life
Happy Numbers
Happy Numbers (Long)
ISBN
Kolakoski Constant
Leap Years
ln 2
Look and Say
Lucky Numbers
Morse Encoder
Niven Numbers
Niven Numbers (Long)
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Prime Numbers
Prime Numbers (Long)
Quine
Rijndael S-box
Seven Segment
Sierpiński Triangle
Spelling Numbers
Tongue-twisters
United States
γ
λ
π
29th
30th
74th
27th
14th
55th
102nd
42nd
32nd
24th
22nd
47th
39th
32nd
9th
29th
31st
11th
13th
10th
59th
39th
59th
5th
τ
φ
√2
𝑒