12 Days of Christmas
462
99 Bottles of Beer
545
Abundant Numbers
818
Arrows
519
Christmas Trees
736
Divisors
720841
Emirp Numbers
573
Evil Numbers
737896921
785
Fibonacci
770
Fizz Buzz
989
Foo Fizz Buzz Bar
862
Happy Numbers
514
Kolakoski Sequence
554
Leap Years
819
Leyland Numbers
668
Look and Say
602
Niven Numbers
785
Odious Numbers
733891919
768
Pangram Grep
944
Pascal’s Triangle
683
Pernicious Numbers
438
Prime Numbers
777
Prime Numbers (Long)
791
Quine
615
866
Recamán
694
Sierpiński Triangle
245
Tongue-twisters
562
λ
148
𝑒
432
4882