99 Bottles of Beer
560
Abundant Numbers
463
Collatz
378
CSS Colors
73
Divisors
583
Emirp Numbers
407
Evil Numbers
299
Fibonacci
283
Fizz Buzz
519
336
388
Happy Numbers
96
Happy Numbers (Long)
134
Leap Years
552
Niven Numbers
293
Odious Numbers
314
Pernicious Numbers
282
Prime Numbers
591
Quine
857
π
295