12 Days of Christmas
372
99 Bottles of Beer
346
Abundant Numbers
721
Arabic to Roman
265
Christmas Trees
607
Diamonds
438
Divisors
871
Emirp Numbers
598
Evil Numbers
976
Fibonacci
973
Fizz Buzz
869763
Happy Numbers
462
Leap Years
796
Leyland Numbers
590
Lucky Tickets
418
Niven Numbers
815
Odious Numbers
800
Pangram Grep
753
Pascal’s Triangle
862
Pernicious Numbers
702
Prime Numbers
889
Quine
969
Roman to Arabic
311
Seven Segment
485
Sierpiński Triangle
470
Spelling Numbers
230
π
324
τ
304
φ
547
𝑒
381