12 Days of Christmas
818
99 Bottles of Beer
690
Abundant Numbers
902
Abundant Numbers (Long)
968
Arabic to Roman
540
Arithmetic Numbers
957
Arrows
421
ASCII Table
549
Card Number Validation
565
Catalan Numbers
388
Christmas Trees
760
Collatz
591818
CSS Colors
179
Day of Week
600
Divisors
953
Emirp Numbers
584
Emirp Numbers (Long)
625
Emojify
246
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
559
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
435533
Minesweeper
412
Morse Encoder
111
N Queens
527
Niven Numbers
846
Niven Numbers (Long)
1,000
Number Spiral
393
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
1,000
Prime Numbers (Long)
1,000
Quine
914
Recamán
708
Reverse Polish Notation
539
Rijndael S-box
226
Roman to Arabic
476
ROT13
488
Set
622
Seven Segment
396
Smith Numbers
617
Tic-tac-toe
350
Time Distance
686
Tongue-twisters
650
Transpose Sentence
489
Trinomial Triangle
44
United States
108115
Vampire Numbers
395
Van Eck Sequence
624
π
75
τ
77
φ
659
√2
893
𝑒
447