12 Days of Christmas
375Abundant Numbers
731Arabic to Roman
440Christmas Trees
640Cubes
383Diamonds
538Divisors
947Emirp Numbers
873Evil Numbers
865
1,000Fibonacci
870
973Fizz Buzz
898Happy Numbers
565Leap Years
878Morse Decoder
429Morse Encoder
448Niven Numbers
963
978Odious Numbers
883
1,000Ordinal Numbers
759Pangram Grep
656Pascal’s Triangle
893Pernicious Numbers
714Prime Numbers
889Quine
969Rock-paper-scissors-Spock-lizard
468Roman to Arabic
346Rule 110
349Seven Segment
533Sierpiński Triangle
711Spelling Numbers
224United States
328φ
703√2
721