12 Days of Christmas
488
99 Bottles of Beer
461
Abundant Numbers
298
Christmas Trees
261
CSS Colors
135
Diamonds
209
Divisors
399
Emirp Numbers
Fibonacci
397
Fizz Buzz
422366407
Happy Numbers
215
Intersection
249
Leap Years
389
Morse Decoder
176
Morse Encoder
158
Niven Numbers
317
Prime Numbers
266
Seven Segment
174
Sierpiński Triangle
321
Tongue-twisters
541
United States
159