12 Days of Christmas
187
99 Bottles of Beer
705
Abundant Numbers
532
Abundant Numbers (Long)
588
Arabic to Roman
243
Arithmetic Numbers
629
Arrows
396
Ascending Primes
147
ASCII Table
410
Card Number Validation
637
Catalan Numbers
490
Christmas Trees
144
Collatz
651
CSS Colors
145
Day of Week
695
Divisors
705601
Emirp Numbers
457
Evil Numbers
561980
Evil Numbers (Long)
567949
Factorial Factorisation
515
Farey Sequence
546
Fibonacci
827857960932
Fizz Buzz
711962
Foo Fizz Buzz Bar
690
Forsyth–Edwards Notation
255
Fractions
573
Happy Numbers
630
Happy Numbers (Long)
591
ISBN
604
Leap Years
740
Leyland Numbers
776
ln 2
905
Look and Say
609
Niven Numbers
582
Niven Numbers (Long)
591
Odious Numbers
905976
Odious Numbers (Long)
571968
Ordinal Numbers
533
Pascal’s Triangle
357
Pernicious Numbers
333
Pernicious Numbers (Long)
391
Prime Numbers
480
Prime Numbers (Long)
472
Recamán
576
Set
463
Spelling Numbers
317
United States
71
π
329
τ
312