Christmas Trees
800
Collatz
708
Emojify
988
Fizz Buzz
900
Jacobi Symbol
881
Kolakoski Sequence
667
Leap Years
688
Look and Say
723
Lucky Numbers
616
Lucky Tickets
934
Niven Numbers (Long)
796
Ordinal Numbers
864
Pernicious Numbers
571
Roman to Arabic
701
Spelling Numbers
791
United States
563
Vampire Numbers
361
π
446