12 Days of Christmas
452
99 Bottles of Beer
542
Abundant Numbers
813
Arrows
522
Christmas Trees
733
Divisors
713833
Emirp Numbers
570
Evil Numbers
722895919
784
Fibonacci
768
Fizz Buzz
986
Foo Fizz Buzz Bar
860
Happy Numbers
510
Kolakoski Sequence
552
Leap Years
796
Leyland Numbers
661
Look and Say
596
Niven Numbers
779
Odious Numbers
702887915
766
Pangram Grep
937
Pascal’s Triangle
680
Pernicious Numbers
434
Prime Numbers
776
Prime Numbers (Long)
789
Quine
607
864
Recamán
685
Sierpiński Triangle
240
Tongue-twisters
562
λ
134
𝑒
431
47