12 Days of Christmas
206
99 Bottles of Beer
830
Abundant Numbers
844
Abundant Numbers (Long)
919
Arabic to Roman
316
Arithmetic Numbers
957
Arrows
535
Ascending Primes
226
ASCII Table
488
Card Number Validation
903
Collatz
984
CSS Colors
229
Day of Week
1,000
Divisors
546935
Emirp Numbers
685
Evil Numbers
980
Evil Numbers (Long)
990
Factorial Factorisation
718
Farey Sequence
885
Fibonacci
9081,000
Fizz Buzz
7421,000
Foo Fizz Buzz Bar
922
Forsyth–Edwards Notation
337
Happy Numbers
962
Leap Years
872
Leyland Numbers
842
ln 2
1,000
Look and Say
888
Niven Numbers
1,000
Niven Numbers (Long)
951
Odious Numbers
990
Odious Numbers (Long)
990
Ordinal Numbers
727
Pascal’s Triangle
577
Pernicious Numbers
587
Prime Numbers
775
Prime Numbers (Long)
779
Recamán
885
Set
613
Spelling Numbers
497
United States
87
π
506
τ
472