99 Bottles of Beer
551
Abundant Numbers
594
Collatz
375
CSS Colors
153
Divisors
614
Emirp Numbers
573
Evil Numbers
309
Fibonacci
281
Fizz Buzz
519
335428
Happy Numbers
152
Happy Numbers (Long)
152
Leap Years
548
Niven Numbers
336
Odious Numbers
333
Pernicious Numbers
287
Prime Numbers
675
Quine
854
π