12 Days of Christmas
127
99 Bottles of Beer
695
Abundant Numbers
532
Abundant Numbers (Long)
581
Arabic to Roman
243
Arithmetic Numbers
629
Arrows
511
Ascending Primes
147
ASCII Table
410
Card Number Validation
637
Catalan Numbers
490
Christmas Trees
144
Collatz
651
CSS Colors
108
Day of Week
695
Divisors
705601
Emirp Numbers
331
Evil Numbers
552980
Evil Numbers (Long)
564949
Factorial Factorisation
517
Farey Sequence
546
Fibonacci
809857960932
Fizz Buzz
711962
Foo Fizz Buzz Bar
689
Forsyth–Edwards Notation
265
Fractions
573
Happy Numbers
538
Happy Numbers (Long)
586
ISBN
599
Leap Years
737
Leyland Numbers
776
ln 2
905
Look and Say
609
Niven Numbers
582
Niven Numbers (Long)
561
Odious Numbers
905976
Odious Numbers (Long)
571968
Ordinal Numbers
532
Pascal’s Triangle
357
Pernicious Numbers
333
Pernicious Numbers (Long)
380
Prime Numbers
453
Prime Numbers (Long)
472
Recamán
576
Set
463
Spelling Numbers
314
United States
68
π
324
τ
308