12 Days of Christmas
415
99 Bottles of Beer
415
Abundant Numbers
741
Christmas Trees
597
Collatz
799
Divisors
858
Emirp Numbers
470
Evil Numbers
786
Fibonacci
911288
Fizz Buzz
741
Happy Numbers
542
Morse Decoder
332
Niven Numbers
864
Odious Numbers
784
Pangram Grep
Pascal’s Triangle
588
Pernicious Numbers
725
Prime Numbers
665
Quine
968947
Recamán
868
Roman to Arabic
470
Seven Segment
529
Sierpiński Triangle
654
Spelling Numbers
300
United States