12 Days of Christmas
912
99 Bottles of Beer
730
Abundant Numbers
785
Christmas Trees
697
Collatz
971
Divisors
919
Emirp Numbers
591
Evil Numbers
800
Fibonacci
923345
Fizz Buzz
817
Happy Numbers
713
Morse Decoder
478
Niven Numbers
880
Odious Numbers
800
Pangram Grep
Pascal’s Triangle
651
Pernicious Numbers
741
Prime Numbers
678
Quine
1,000969
Recamán
871
Roman to Arabic
641
Seven Segment
716
Sierpiński Triangle
687
Spelling Numbers
532
United States