12 Days of Christmas
200
99 Bottles of Beer
805
Abundant Numbers
799
Abundant Numbers (Long)
854
Arabic to Roman
291
Arithmetic Numbers
877
Arrows
493
Ascending Primes
204
ASCII Table
457
Card Number Validation
804
Catalan Numbers
681
Christmas Trees
203
Collatz
924
CSS Colors
205
Day of Week
907
Divisors
694886
Emirp Numbers
634
Evil Numbers
918982
Evil Numbers (Long)
909952
Factorial Factorisation
653
Farey Sequence
794
Fibonacci
829871959935
Fizz Buzz
722974
Foo Fizz Buzz Bar
877
Forsyth–Edwards Notation
307
Fractions
694
Happy Numbers
891
Happy Numbers (Long)
812
ISBN
752
Leap Years
828
Leyland Numbers
763
ln 2
900
Look and Say
809
Niven Numbers
939
Niven Numbers (Long)
877
Odious Numbers
923980
Odious Numbers (Long)
906973
Ordinal Numbers
670
Pascal’s Triangle
527
Pernicious Numbers
542
Pernicious Numbers (Long)
583
Prime Numbers
731
Prime Numbers (Long)
720
Recamán
811
Set
531
Spelling Numbers
448
United States
81
π
472
τ
432