12 Days of Christmas
370
99 Bottles of Beer
343
Abundant Numbers
708
Arabic to Roman
259
Christmas Trees
597
Diamonds
429
Divisors
858
Emirp Numbers
587
Evil Numbers
958
Fibonacci
960
Fizz Buzz
862750
Happy Numbers
453
Leap Years
784
Leyland Numbers
575
Lucky Tickets
400
Niven Numbers
800
Odious Numbers
784
Pangram Grep
734
Pascal’s Triangle
841
Pernicious Numbers
686
Prime Numbers
872
Quine
946
Roman to Arabic
302
Seven Segment
474
Sierpiński Triangle
460
Spelling Numbers
222
π
317
τ
296
φ
532
𝑒
372