Christmas Trees
762
Collatz
669
Emojify
952
Fizz Buzz
852
Jacobi Symbol
773
Kolakoski Sequence
583
Leap Years
641
Look and Say
706
Lucky Numbers
561
Lucky Tickets
812
Niven Numbers (Long)
744
Ordinal Numbers
798
Pernicious Numbers
535
Roman to Arabic
636
Spelling Numbers
660
United States
534
Vampire Numbers
327
π
422