12 Days of Christmas
821
99 Bottles of Beer
553
Abundant Numbers
526
Christmas Trees
642
Diamonds
193
Divisors
795
555
Emirp Numbers
339
Evil Numbers
324
Fibonacci
622
Fizz Buzz
385
421
675
416
681
706
694
451
584
496
580
572
619
473
466
625
533
685
Kolakoski Sequence
238
Leap Years
466
Niven Numbers
508
Odious Numbers
325
Pangram Grep
385
Pernicious Numbers
191
Prime Numbers
416
448
424
Sierpiński Triangle
87
Tongue-twisters
697
United States
94