12 Days of Christmas
336
99 Bottles of Beer
271
Abundant Numbers
681
Arrows
329
Christmas Trees
388
Diamonds
279
Divisors
711
Emirp Numbers
447
Evil Numbers
800
Fibonacci
947
Fizz Buzz
582
Happy Numbers
331
Intersection
218
Leap Years
741
Leyland Numbers
564
Niven Numbers
603
Odious Numbers
800
Pangram Grep
718
Pascal’s Triangle
446
Pernicious Numbers
702
Prime Numbers
727
Seven Segment
273
Sierpiński Triangle
134
π
254
τ
248
φ
515
𝑒
511