12 Days of Christmas
131
99 Bottles of Beer
727
Abundant Numbers
563
Abundant Numbers (Long)
630
Arabic to Roman
268
Arithmetic Numbers
695
Arrows
557
Ascending Primes
162
ASCII Table
441
Card Number Validation
710
Catalan Numbers
541
Christmas Trees
155
Collatz
693
CSS Colors
119
Day of Week
755
Divisors
733637
Emirp Numbers
355
Evil Numbers
5861,000
Evil Numbers (Long)
610976
Factorial Factorisation
567
Farey Sequence
597
Fibonacci
8339081,000947
Fizz Buzz
734989
Foo Fizz Buzz Bar
726
Forsyth–Edwards Notation
295
Fractions
628
Happy Numbers
579
Happy Numbers (Long)
643
ISBN
663
Leap Years
797
Leyland Numbers
865
ln 2
1,000
Look and Say
669
Niven Numbers
631
Niven Numbers (Long)
610
Odious Numbers
9681,000
Odious Numbers (Long)
6201,000
Ordinal Numbers
578
Pascal’s Triangle
390
Pernicious Numbers
359
Pernicious Numbers (Long)
420
Prime Numbers
478
Prime Numbers (Long)
507
Recamán
628
Set
532
Spelling Numbers
487
United States
73
π
365
τ
342