12 Days of Christmas
417
99 Bottles of Beer
415
Abundant Numbers
741
Christmas Trees
596
Collatz
797
Divisors
857
Emirp Numbers
470
Evil Numbers
785
Fibonacci
911287
Fizz Buzz
741
Happy Numbers
541
Morse Decoder
334
Niven Numbers
863
Odious Numbers
783
Pangram Grep
Pascal’s Triangle
588
Pernicious Numbers
724
Prime Numbers
665
Quine
967946
Recamán
867
Roman to Arabic
469
Seven Segment
534
Sierpiński Triangle
653
Spelling Numbers
302
United States