12 Days of Christmas
821
99 Bottles of Beer
567
Abundant Numbers
525
Christmas Trees
642
Diamonds
192
Divisors
794
555
Emirp Numbers
339
Evil Numbers
324
Fibonacci
621
Fizz Buzz
384
421
674
415
681
705
694
450
583
496
579
572
619
473
465
624
532
685Kolakoski Sequence
238
Leap Years
466
Niven Numbers
507
Odious Numbers
325
Pangram Grep
384
Pernicious Numbers
191
Prime Numbers
415
448
424
SierpiΕski Triangle
87
Tongue-twisters
696
United States
94