12 Days of Christmas
389
Abundant Numbers
496649
Abundant Numbers (Long)
538659
Arithmetic Numbers
687
Catalan Numbers
677
Christmas Trees
503
Collatz
689
Divisors
824
Emirp Numbers
396
Emirp Numbers (Long)
444
Evil Numbers
817
Evil Numbers (Long)
797
Farey Sequence
551
Fibonacci
933
Fizz Buzz
860
Foo Fizz Buzz Bar
553720
Happy Numbers
350
Happy Numbers (Long)
437
Inventory Sequence
620
Kolakoski Constant
57
Kolakoski Sequence
328
Leap Years
845
Look and Say
515
Lucky Numbers
417
Niven Numbers
535933
Niven Numbers (Long)
653
Odious Numbers
781
Odious Numbers (Long)
764
Ordinal Numbers
444
Pangram Grep
636
Pascal’s Triangle
666
Pernicious Numbers
437
Pernicious Numbers (Long)
513
Prime Numbers
891
Prime Numbers (Long)
950
Recamán
685
Sierpiński Triangle
529
Tongue-twisters
335337
Van Eck Sequence
594