99 Bottles of Beer
598
Abundant Numbers
478
Collatz
401
CSS Colors
83
Divisors
603
Emirp Numbers
418
Evil Numbers
310
Fibonacci
291
Fizz Buzz
540
344
395
Happy Numbers
98
Happy Numbers (Long)
140
Leap Years
569
Niven Numbers
302
Odious Numbers
325
Pernicious Numbers
292
Prime Numbers
614
Quine
893
π
304