12 Days of Christmas
99 Bottles of Beer
18th
Abundant Numbers
Arabic to Roman
Ascending Primes
brainfuck
10th
Christmas Trees
Divisors
Emirp Numbers
Emojify
Evil Numbers
50th
Fibonacci
42nd
Fizz Buzz
31st
Intersection
Leap Years
94th
Niven Numbers
53rd37th57th
Odious Numbers
67th
Prime Numbers
Quine
90th
λ
20th
π
√2