12 Days of Christmas
469
99 Bottles of Beer
690
Abundant Numbers
869
Abundant Numbers (Long)
968
Arabic to Roman
540
Arithmetic Numbers
957
Arrows
526
ASCII Table
549
Card Number Validation
565
Catalan Numbers
388
Christmas Trees
760
Collatz
591818
CSS Colors
80
Day of Week
600
Divisors
953
Emirp Numbers
384
Emirp Numbers (Long)
625
Emojify
242
Evil Numbers
816
Evil Numbers (Long)
902
Factorial Factorisation
649
Farey Sequence
623
Fibonacci
500
623
Fizz Buzz
841
Foo Fizz Buzz Bar
812
Fractions
701
Happy Numbers
390
Happy Numbers (Long)
667
Intersection
712
ISBN
712
Kaprekar Numbers
175
Kolakoski Constant
107
Kolakoski Sequence
288
Leap Years
772
Levenshtein Distance
442
Leyland Numbers
479
ln 2
425533
Minesweeper
412
Morse Encoder
145
N Queens
527
Niven Numbers
846
Niven Numbers (Long)
1,000
Number Spiral
357
Odious Numbers
820
Odious Numbers (Long)
923
Ordinal Numbers
750
Pangram Grep
721
Partition Numbers
599822
Pascal’s Triangle
680
Pernicious Numbers
618
Pernicious Numbers (Long)
789
Prime Numbers
854
Prime Numbers (Long)
1,000
Quine
914
Recamán
708
Reverse Polish Notation
539
Rijndael S-box
226
Roman to Arabic
465
ROT13
488
Set
622
Seven Segment
396
Smith Numbers
617
Tic-tac-toe
350
Time Distance
665
Tongue-twisters
398
Transpose Sentence
489
Trinomial Triangle
44
United States
102115
Vampire Numbers
395
Van Eck Sequence
624
π
75
τ
77
φ
659
√2
893
𝑒
447