12 Days of Christmas
17099 Bottles of Beer
398Abundant Numbers
219Christmas Trees
86Cubes
32Diamonds
44Divisors
27Emirp Numbers
394Evil Numbers
320Fibonacci
621Fizz Buzz
318Happy Numbers
441Leap Years
641Niven Numbers
285Pascal’s Triangle
50Pernicious Numbers
203Prime Numbers
351Rule 110
4Sierpiński Triangle
86United States
103λ
180π
50τ
50φ
44√2
46𝑒
38