12 Days of Christmas
400
Abundant Numbers
498651
Abundant Numbers (Long)
544662
Arithmetic Numbers
673
Catalan Numbers
680
Christmas Trees
506
Collatz
716
Divisors
844
Emirp Numbers
397
Emirp Numbers (Long)
454
Evil Numbers
818
Evil Numbers (Long)
800
Farey Sequence
590
Fibonacci
935
Fizz Buzz
862
Foo Fizz Buzz Bar
555723
Happy Numbers
352
Happy Numbers (Long)
439
Inventory Sequence
624
Kolakoski Constant
58
Kolakoski Sequence
328
Leap Years
847
Look and Say
519
Lucky Numbers
421
Niven Numbers
548939
Niven Numbers (Long)
659
Odious Numbers
784
Odious Numbers (Long)
767
Ordinal Numbers
466
Pangram Grep
639
Pascal’s Triangle
668
Pernicious Numbers
439
Pernicious Numbers (Long)
540
Prime Numbers
892
Prime Numbers (Long)
952
Recamán
690
Sierpiński Triangle
535
Tongue-twisters
339331
Van Eck Sequence
596