12 Days of Christmas
389
99 Bottles of Beer
344
Abundant Numbers
472
Christmas Trees
469
Cubes
33
Diamonds
316
Divisors
753
Emirp Numbers
Evil Numbers
317
Fibonacci
498
Fizz Buzz
509
Happy Numbers
374
Leap Years
632
Niven Numbers
517
Odious Numbers
303
Ordinal Numbers
445
Pangram Grep
715
Pascal’s Triangle
276
Pernicious Numbers
121
Prime Numbers
720
Roman to Arabic
343
Rule 110
10
Sierpiński Triangle
113
United States
238
λ
105
π
91
τ
49
φ
44
√2
45
𝑒
37