12 Days of Christmas
334
99 Bottles of Beer
268
Abundant Numbers
669
Arrows
321
Christmas Trees
382
Diamonds
273
Divisors
700
Emirp Numbers
439
Evil Numbers
786
Fibonacci
935
Fizz Buzz
578
Happy Numbers
325
Intersection
211
Leap Years
730
Leyland Numbers
549
Niven Numbers
592
Odious Numbers
784
Pangram Grep
699
Pascal’s Triangle
436
Pernicious Numbers
686
Prime Numbers
714
Seven Segment
267
Sierpiński Triangle
131
π
249
τ
241
φ
501
𝑒
498