12 Days of Christmas
507
99 Bottles of Beer
473
Abundant Numbers
296
Christmas Trees
261
CSS Colors
230
Diamonds
209
Divisors
416
Emirp Numbers
Fibonacci
403
Fizz Buzz
438521408
Happy Numbers
219
Intersection
245
Leap Years
386
Morse Decoder
144
Morse Encoder
128
Niven Numbers
322
Prime Numbers
273
Seven Segment
176
Sierpiński Triangle
270
Tongue-twisters
563
United States
161