12 Days of Christmas
127
99 Bottles of Beer
695
Abundant Numbers
532
Abundant Numbers (Long)
581
Arabic to Roman
248
Arithmetic Numbers
628
Arrows
516
Ascending Primes
148
ASCII Table
410
Card Number Validation
635
Catalan Numbers
490
Christmas Trees
145
Collatz
651
CSS Colors
108
Day of Week
694
Divisors
705601
Emirp Numbers
332
Evil Numbers
552980
Evil Numbers (Long)
565949
Factorial Factorisation
517
Farey Sequence
546
Fibonacci
809870960932
Fizz Buzz
711963
Foo Fizz Buzz Bar
691
Forsyth–Edwards Notation
265
Fractions
574
Happy Numbers
538
Happy Numbers (Long)
585
ISBN
599
Leap Years
737
Leyland Numbers
776
ln 2
904
Look and Say
609
Niven Numbers
582
Niven Numbers (Long)
561
Odious Numbers
906976
Odious Numbers (Long)
571968
Ordinal Numbers
534
Pascal’s Triangle
356
Pernicious Numbers
333
Pernicious Numbers (Long)
379
Prime Numbers
453
Prime Numbers (Long)
472
Recamán
575
Set
463
Spelling Numbers
382
United States
68
π
323
τ
307