12 Days of Christmas
508
99 Bottles of Beer
471
Abundant Numbers
297
Christmas Trees
264
CSS Colors
229
Diamonds
209
Divisors
404
Emirp Numbers
Fibonacci
403
Fizz Buzz
438522408
Happy Numbers
220
Intersection
245
Leap Years
388
Morse Decoder
143
Morse Encoder
128
Niven Numbers
324
Prime Numbers
273
Seven Segment
175
Sierpiński Triangle
270
Tongue-twisters
563
United States
161