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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

CSS Colors

Cubes

Day of Week

Diamonds

Divisors

Emirp Numbers

Emirp Numbers (Long)

Emojify

Evil Numbers

Evil Numbers (Long)

Factorial Factorisation

Farey Sequence

Fibonacci

Fizz Buzz

Foo Fizz Buzz Bar

Fractions

Gijswijt’s Sequence

Happy Numbers

Happy Numbers (Long)

Inventory Sequence

ISBN

Kolakoski Constant

Kolakoski Sequence

Leap Years

Leyland Numbers

ln 2

Look and Say

Lucky Numbers

Morse Encoder

N Queens

Niven Numbers

Niven Numbers (Long)

Number Spiral

Odious Numbers

Odious Numbers (Long)

Pascal’s Triangle

Pernicious Numbers

Pernicious Numbers (Long)

Prime Numbers

Prime Numbers (Long)

Quine

Recamán

Reverse Polish Notation

Reversi

Rijndael S-box

Rock-paper-scissors-Spock-lizard

Seven Segment

SI Units

Sierpiński Triangle

Smith Numbers

Tongue-twisters

United States

Vampire Numbers

Van Eck Sequence

γ

λ

π

τ

φ

√2

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