12 Days of Christmas
192
99 Bottles of Beer
727
Abundant Numbers
570
Abundant Numbers (Long)
637
Arabic to Roman
268
Arithmetic Numbers
695
Arrows
429
Ascending Primes
162
ASCII Table
403
Card Number Validation
710
Catalan Numbers
541
Christmas Trees
155
Collatz
693
CSS Colors
230
Day of Week
755
Divisors
733637
Emirp Numbers
498
Evil Numbers
5961,000
Evil Numbers (Long)
614976
Factorial Factorisation
569
Farey Sequence
597
Fibonacci
852908606947
Fizz Buzz
742701
Foo Fizz Buzz Bar
726
Forsyth–Edwards Notation
291
Fractions
628
Happy Numbers
679
Happy Numbers (Long)
650
ISBN
663
Leap Years
556
Leyland Numbers
665
ln 2
743
Look and Say
669
Niven Numbers
631
Niven Numbers (Long)
642
Odious Numbers
6061,000
Odious Numbers (Long)
6201,000
Ordinal Numbers
578
Pascal’s Triangle
390
Pernicious Numbers
359
Pernicious Numbers (Long)
426
Prime Numbers
507
Prime Numbers (Long)
507
Recamán
628
Set
532
Spelling Numbers
494
United States
77
π
371
τ
347