12 Days of Christmas
851
Abundant Numbers
721
Arithmetic Numbers
607
808
Arrows
707
Ascending Primes
880
Christmas Trees
926
Collatz
798
CSS Colors
544
DFA Simulator
856
Diamonds
903
Divisors
664
933
Evil Numbers
431
982
Factorial Factorisation
464
Fibonacci
927657765935
Fizz Buzz
898
814891
Foo Fizz Buzz Bar
901
Fractions
879
Intersection
589
Leap Years
702
698864
Levenshtein Distance
767
Leyland Numbers
867
Look and Say
969
Medal Tally
854
Morse Decoder
619
Musical Chords
860
417
Niven Numbers
856
Niven Numbers (Long)
814
903
Odious Numbers
446
979
Ordinal Numbers
578
739
Pernicious Numbers
513
Poker
884
394
Prime Numbers
532
Quine
1,000
946
Recamán
776
Repeating Decimals
391
Reverse Polish Notation
693
Rock-paper-scissors-Spock-lizard
848
Sierpiński Triangle
698
Spelling Numbers
Ten-pin Bowling
888
Tongue-twisters
714
United States
900
913
Vampire Numbers
660
φ
746
√2
796