Christmas Trees
733
Collatz
649
Emojify
937
Fizz Buzz
836
Jacobi Symbol
756
Kolakoski Sequence
584
Leap Years
631
Look and Say
671
Lucky Numbers
547
Lucky Tickets
792
Niven Numbers (Long)
707
Ordinal Numbers
785
Pernicious Numbers
522
Roman to Arabic
612
Spelling Numbers
660
United States
517
Vampire Numbers
321
π
418