Christmas Trees
762
Collatz
670
Emojify
952
Fizz Buzz
852
Jacobi Symbol
756
Kolakoski Sequence
584
Leap Years
641
Look and Say
706
Lucky Numbers
561
Lucky Tickets
812
Niven Numbers (Long)
745
Ordinal Numbers
798
Pernicious Numbers
535
Roman to Arabic
636
Spelling Numbers
660
United States
534
Vampire Numbers
327
π
422