12 Days of Christmas
809
99 Bottles of Beer
604
Abundant Numbers
750
Arabic to Roman
373
Christmas Trees
697
Diamonds
523
Divisors
919
Emirp Numbers
739
Evil Numbers
976
Fibonacci
973
Fizz Buzz
951847
Happy Numbers
596
Leap Years
796
Leyland Numbers
695
Lucky Tickets
554
Niven Numbers
815
Odious Numbers
800
Pangram Grep
889
Pascal’s Triangle
931
Pernicious Numbers
702
Prime Numbers
889
Quine
969
Roman to Arabic
412
Seven Segment
665
Sierpiński Triangle
487
Spelling Numbers
392
π
363
τ
340
φ
558
𝑒
381