12 Days of Christmas
645
Abundant Numbers
702
Arithmetic Numbers
583
778
Arrows
678
Ascending Primes
874
Christmas Trees
903
Collatz
768
CSS Colors
548
DFA Simulator
717
Diamonds
881
Divisors
633
911
Evil Numbers
422
980
Factorial Factorisation
448
Fibonacci
905650759933
Fizz Buzz
889
807890
Foo Fizz Buzz Bar
889
Fractions
876
Intersection
578
Leap Years
686
643862
Levenshtein Distance
754
Leyland Numbers
847
Look and Say
916
Medal Tally
812
Morse Decoder
592
Musical Chords
766
405
Niven Numbers
820
Niven Numbers (Long)
772
895
Odious Numbers
429
977
Ordinal Numbers
567
705
Pernicious Numbers
493
Poker
895
385
Prime Numbers
532
Quine
986
946
Recamán
733
Repeating Decimals
392
Reverse Polish Notation
693
Rock-paper-scissors-Spock-lizard
836
Sierpiński Triangle
657
Spelling Numbers
Ten-pin Bowling
838
Tongue-twisters
710
United States
886
888
Vampire Numbers
652
φ
733
√2
766