12 Days of Christmas
370
99 Bottles of Beer
343
Abundant Numbers
708
Arabic to Roman
259
Christmas Trees
596
Diamonds
428
Divisors
857
Emirp Numbers
587
Evil Numbers
957
Fibonacci
960
Fizz Buzz
862750
Happy Numbers
453
Leap Years
784
Leyland Numbers
575
Lucky Tickets
399
Niven Numbers
799
Odious Numbers
783
Pangram Grep
733
Pascal’s Triangle
840
Pernicious Numbers
686
Prime Numbers
872
Quine
946
Roman to Arabic
301
Seven Segment
474
Sierpiński Triangle
460
Spelling Numbers
222
π
317
τ
295
φ
531
𝑒
371