Troon

12 Days of Christmas

99 Bottles of Beer

Abundant Numbers

Abundant Numbers (Long)

Arabic to Roman

Arrows

ASCII Table

Catalan Numbers

Collatz

CSS Colors

Cubes

Divisors

Emirp Numbers

Emirp Numbers (Long)

Evil Numbers

Evil Numbers (Long)

Fibonacci

Fizz Buzz

Foo Fizz Buzz Bar

Fractions

Happy Numbers

Happy Numbers (Long)

Hexdump

ISBN

Leap Years

Leyland Numbers

Lucky Numbers

Morse Decoder

Morse Encoder

Niven Numbers

Niven Numbers (Long)

Odious Numbers

Odious Numbers (Long)

Pangram Grep

Pernicious Numbers

Prime Numbers

Prime Numbers (Long)

Recamán

Roman to Arabic

Seven Segment

Smith Numbers

Tongue-twisters

United States

Vampire Numbers

Van Eck Sequence