12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
brainfuck
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
4th
CSS Colors
Cubes
Day of Week
Diamonds
Divisors
21st
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
15th
Fizz Buzz
Foo Fizz Buzz Bar
7th
Fractions
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Inventory Sequence
ISBN
Kolakoski Constant
Kolakoski Sequence
10th
Leap Years
11th
Levenshtein Distance
Leyland Numbers
ln 2
2nd
Look and Say
Lucky Numbers
Morse Encoder
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
12th
Odious Numbers (Long)
Ordinal Numbers
Pangram Grep
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Prime Numbers
5th
Prime Numbers (Long)
5th
Quine
1st
Recamán
Repeating Decimals
Reverse Polish Notation
Rijndael S-box
3rd
Roman to Arabic
Rule 110
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Time Distance
Tongue-twisters
United States
Vampire Numbers
Van Eck Sequence
Zodiac Signs
γ
2nd
λ
π
3rd
14th
15th
63rd
27th
14th
56th
83rd
60th
33rd
19th
47th
12th
23rd
17th
24th
31st
10th
17th
19th
53rd
28th
51st
28th
17th
72nd
39th
90th
τ
3rd
φ
5th
√2
𝑒
4th