12 Days of Christmas
462
99 Bottles of Beer
545
Abundant Numbers
818
Arrows
526
Christmas Trees
737
Divisors
721841
Emirp Numbers
574
Evil Numbers
738896922
785
Fibonacci
771
Fizz Buzz
989
Foo Fizz Buzz Bar
863
Happy Numbers
515
Kolakoski Sequence
555
Leap Years
819
Leyland Numbers
669
Look and Say
603
Niven Numbers
786
Odious Numbers
734892920
768
Pangram Grep
945
Pascal’s Triangle
684
Pernicious Numbers
438
Prime Numbers
777
Prime Numbers (Long)
793
Quine
615
866
Recamán
695
Sierpiński Triangle
245
Tongue-twisters
563
λ
147
𝑒
434
4881