12 Days of Christmas
868
Abundant Numbers
742678
Abundant Numbers (Long)
787746
Arithmetic Numbers
787
Catalan Numbers
679
Christmas Trees
581
Collatz
853
Divisors
890
Emirp Numbers
489
Emirp Numbers (Long)
544
Evil Numbers
818
Evil Numbers (Long)
798
Fibonacci
934
Fizz Buzz
944
Foo Fizz Buzz Bar
702909
Happy Numbers
453
Happy Numbers (Long)
517
Inventory Sequence
658
Kolakoski Constant
71
Kolakoski Sequence
334
Leap Years
847
Look and Say
636
Lucky Numbers
444
Niven Numbers
861941
Niven Numbers (Long)
660
Odious Numbers
783
Odious Numbers (Long)
765
Ordinal Numbers
571
Pangram Grep
753
Pascal’s Triangle
721
Pernicious Numbers
439
Pernicious Numbers (Long)
548
Prime Numbers
891
Prime Numbers (Long)
951
Recamán
764
Sierpiński Triangle
572
Tongue-twisters
595596
Van Eck Sequence
628