12 Days of Christmas
507
99 Bottles of Beer
474
Abundant Numbers
299
Christmas Trees
262
CSS Colors
195
Diamonds
210
Divisors
398
Emirp Numbers
Fibonacci
396
Fizz Buzz
423367408
Happy Numbers
216
Intersection
247
Leap Years
389
Morse Decoder
143
Morse Encoder
128
Niven Numbers
319
Prime Numbers
267
Seven Segment
175
Sierpiński Triangle
267
Tongue-twisters
562
United States
161