12 Days of Christmas
891
99 Bottles of Beer
821
Abundant Numbers
795
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Christmas Trees
769
Cubes
595
Diamonds
656
Divisors
881
Emirp Numbers
492
Evil Numbers
675
Fibonacci
950
702
Fizz Buzz
884
Lucky Tickets
Morse Decoder
417
Niven Numbers
906
Odious Numbers
680
Pangram Grep
753
Pernicious Numbers
513
Prime Numbers
710
United States
406
π
434
τ
427
φ
547
√2
516