12 Days of Christmas
873
99 Bottles of Beer
769
Abundant Numbers
821
Arrows
373
Christmas Trees
739
Divisors
720841
Emirp Numbers
651
Evil Numbers
751912921
785
Fibonacci
770
Fizz Buzz
992
Foo Fizz Buzz Bar
869
Happy Numbers
624
Kolakoski Sequence
554
Leap Years
820
Leyland Numbers
669
Look and Say
602
Niven Numbers
789
Odious Numbers
733924919
768
Pangram Grep
946
Pascal’s Triangle
683
Pernicious Numbers
438
Prime Numbers
777
Prime Numbers (Long)
791
Quine
615
866
Recamán
696
Sierpiński Triangle
250
Tongue-twisters
850
λ
200
𝑒
439
4883