Christmas Trees
760
Collatz
665
Emojify
952
Fizz Buzz
862
Jacobi Symbol
792
Kolakoski Sequence
617
Leap Years
637
Look and Say
705
Lucky Numbers
559
Lucky Tickets
812
Niven Numbers (Long)
741
Ordinal Numbers
796
Pernicious Numbers
533
Roman to Arabic
636
Spelling Numbers
660
United States
534
Vampire Numbers
326
π
420