12 Days of Christmas
400
Abundant Numbers
734650
Abundant Numbers (Long)
778661
Arithmetic Numbers
671
Catalan Numbers
679
Christmas Trees
505
Collatz
715
Divisors
844
Emirp Numbers
397
Emirp Numbers (Long)
453
Evil Numbers
818
Evil Numbers (Long)
798
Fibonacci
934
Fizz Buzz
862
Foo Fizz Buzz Bar
698722
Happy Numbers
351
Happy Numbers (Long)
438
Inventory Sequence
622
Kolakoski Constant
60
Kolakoski Sequence
334
Leap Years
847
Look and Say
518
Lucky Numbers
428
Niven Numbers
858938
Niven Numbers (Long)
658
Odious Numbers
783
Odious Numbers (Long)
765
Ordinal Numbers
465
Pangram Grep
638
Pascal’s Triangle
668
Pernicious Numbers
439
Pernicious Numbers (Long)
538
Prime Numbers
891
Prime Numbers (Long)
951
Recamán
689
Sierpiński Triangle
534
Tongue-twisters
397336
Van Eck Sequence
594