12 Days of Christmas
418
99 Bottles of Beer
415
Abundant Numbers
741
Christmas Trees
597
Collatz
798
Divisors
858
Emirp Numbers
470
Evil Numbers
785
Fibonacci
911287
Fizz Buzz
741
Happy Numbers
541
Morse Decoder
334
Niven Numbers
864
Odious Numbers
784
Pangram Grep
Pascal’s Triangle
588
Pernicious Numbers
724
Prime Numbers
665
Quine
967946
Recamán
868
Roman to Arabic
470
Seven Segment
535
Sierpiński Triangle
654
Spelling Numbers
302
United States