12 Days of Christmas
451
99 Bottles of Beer
542
Abundant Numbers
813
Arrows
522
Christmas Trees
733
Divisors
713833
Emirp Numbers
570
Evil Numbers
722896920
784
Fibonacci
768
Fizz Buzz
986
Foo Fizz Buzz Bar
860
Happy Numbers
511
Kolakoski Sequence
553
Leap Years
796
Leyland Numbers
642
Look and Say
596
Niven Numbers
779
Odious Numbers
702888915
766
Pangram Grep
938
Pascal’s Triangle
680
Pernicious Numbers
435
Prime Numbers
776
Prime Numbers (Long)
790
Quine
607
864
Recamán
686
Sierpiński Triangle
240
Tongue-twisters
547
λ
133
𝑒
432
47