12 Days of Christmas
873
99 Bottles of Beer
769
Abundant Numbers
821
Arrows
373
Christmas Trees
740
Divisors
720841
Emirp Numbers
651
Evil Numbers
752913922
785
Fibonacci
771
Fizz Buzz
992
Foo Fizz Buzz Bar
870
Happy Numbers
625
Kolakoski Sequence
554
Leap Years
820
Leyland Numbers
670
Look and Say
603
Niven Numbers
789
Odious Numbers
734924920
768
Pangram Grep
947
Pascal’s Triangle
684
Pernicious Numbers
438
Prime Numbers
777
Prime Numbers (Long)
792
Quine
615
866
Recamán
697
Sierpiński Triangle
250
Tongue-twisters
850
λ
200
𝑒
440
4883