12 Days of Christmas
868
Abundant Numbers
743679
Abundant Numbers (Long)
788747
Arithmetic Numbers
789
Catalan Numbers
680
Christmas Trees
581
Collatz
854
Divisors
890
Emirp Numbers
490
Emirp Numbers (Long)
545
Evil Numbers
818
Evil Numbers (Long)
800
Farey Sequence
669
Fibonacci
935
Fizz Buzz
945
Foo Fizz Buzz Bar
704910
Happy Numbers
453
Happy Numbers (Long)
518
Inventory Sequence
660
Kolakoski Constant
68
Kolakoski Sequence
335
Leap Years
848
Look and Say
637
Lucky Numbers
437
Niven Numbers
863941
Niven Numbers (Long)
661
Odious Numbers
784
Odious Numbers (Long)
767
Ordinal Numbers
572
Pangram Grep
754
Pascal’s Triangle
721
Pernicious Numbers
439
Pernicious Numbers (Long)
550
Prime Numbers
892
Prime Numbers (Long)
952
Recamán
765
Sierpiński Triangle
553
Tongue-twisters
595596
Van Eck Sequence
629