Christmas Trees
732
Collatz
650
Emojify
935
Fizz Buzz
821
Jacobi Symbol
747
Kolakoski Sequence
573
Leap Years
604
Look and Say
671
Lucky Numbers
543
Lucky Tickets
792
Niven Numbers (Long)
707
Ordinal Numbers
775
Pernicious Numbers
522
Roman to Arabic
612
Spelling Numbers
660
United States
513
Vampire Numbers
317
π
419