12 Days of Christmas
420
99 Bottles of Beer
418
Abundant Numbers
754
Christmas Trees
607
Collatz
814
Divisors
871
Emirp Numbers
478
Evil Numbers
800
Fibonacci
923291
Fizz Buzz
746
Happy Numbers
552
Morse Decoder
340
Niven Numbers
880
Odious Numbers
800
Pangram Grep
Pascal’s Triangle
602
Pernicious Numbers
741
Prime Numbers
678
Quine
1,000969
Recamán
887
Roman to Arabic
484
Seven Segment
547
Sierpiński Triangle
667
Spelling Numbers
312
United States