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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

ASCII Table

Catalan Numbers

Christmas Trees

Collatz

CSS Colors

Day of Week

Divisors

Emojify

Evil Numbers

Evil Numbers (Long)

Fibonacci

Fizz Buzz

Foo Fizz Buzz Bar

Happy Numbers

ISBN

Kolakoski Sequence

Leap Years

Leyland Numbers

Look and Say

Lucky Numbers

Niven Numbers

Number Spiral

Odious Numbers

Odious Numbers (Long)

Ordinal Numbers

Pangram Grep

Pascal’s Triangle

Pernicious Numbers

Recamán

Reverse Polish Notation

Rijndael S-box

Roman to Arabic

Rule 110

Spelling Numbers

Tongue-twisters

United States