Abundant Numbers
561
Abundant Numbers (Long)
668
Arrows
207
Christmas Trees
556
Collatz
732
Continued Fractions
733
Fibonacci
601
Fizz Buzz
522
Foo Fizz Buzz Bar
450
Leap Years
640
Look and Say
542
Pernicious Numbers
393
Pernicious Numbers (Long)
491
Prime Numbers
613
Prime Numbers (Long)
648
Quine
688