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
Catalan Numbers
755
Christmas Trees
217
Collatz
984
CSS Colors
230
Day of Week
1,000
Divisors
733935
Emirp Numbers
685
Evil Numbers
9801,000
Evil Numbers (Long)
990976
Factorial Factorisation
718
Farey Sequence
885
Fibonacci
8529081,000947
Fizz Buzz
7421,000
Foo Fizz Buzz Bar
922
Forsyth–Edwards Notation
337
Fractions
758
Happy Numbers
962
Happy Numbers (Long)
892
ISBN
823
Leap Years
872
Leyland Numbers
842
ln 2
1,000
Look and Say
888
Niven Numbers
1,000
Niven Numbers (Long)
951
Odious Numbers
9901,000
Odious Numbers (Long)
9901,000
Ordinal Numbers
727
Pascal’s Triangle
577
Pernicious Numbers
587
Pernicious Numbers (Long)
636
Prime Numbers
775
Prime Numbers (Long)
779
Recamán
885
Set
613
Spelling Numbers
497
United States
87
π
506
τ
472