12 Days of Christmas
462
99 Bottles of Beer
545
Abundant Numbers
818
Arrows
526
Christmas Trees
737
Divisors
720841
Emirp Numbers
574
Evil Numbers
737895921
785
Fibonacci
771
Fizz Buzz
989
Foo Fizz Buzz Bar
863
Happy Numbers
514
Kolakoski Sequence
554
Leap Years
819
Leyland Numbers
669
Look and Say
602
Niven Numbers
785
Odious Numbers
734890919
768
Pangram Grep
944
Pascal’s Triangle
684
Pernicious Numbers
438
Prime Numbers
777
Prime Numbers (Long)
792
Quine
615
866
Recamán
695
Sierpiński Triangle
245
Tongue-twisters
563
λ
147
𝑒
433
4883