12 Days of Christmas
462
99 Bottles of Beer
545
Abundant Numbers
819
Arrows
527
Christmas Trees
737
Divisors
721841
Emirp Numbers
574
Evil Numbers
724898922
786
Fibonacci
771
Fizz Buzz
989
Foo Fizz Buzz Bar
864
Happy Numbers
515
Kolakoski Sequence
555
Leap Years
819
Leyland Numbers
670
Look and Say
603
Niven Numbers
786
Odious Numbers
720892920
769
Pangram Grep
946
Pascal’s Triangle
684
Pernicious Numbers
439
Prime Numbers
777
Prime Numbers (Long)
794
Quine
615
867
Recamán
695
Sierpiński Triangle
245
Tongue-twisters
563
λ
147
𝑒
434
48