12 Days of Christmas
178
99 Bottles of Beer
705
Abundant Numbers
532
Abundant Numbers (Long)
588
Arabic to Roman
244
Arithmetic Numbers
630
Arrows
396
Ascending Primes
148
ASCII Table
411
Card Number Validation
639
Catalan Numbers
491
Christmas Trees
145
Collatz
651
CSS Colors
145
Day of Week
696
Divisors
705601
Emirp Numbers
458
Evil Numbers
561980
Evil Numbers (Long)
568949
Factorial Factorisation
516
Farey Sequence
547
Fibonacci
827858961932
Fizz Buzz
711962
Foo Fizz Buzz Bar
690
Forsyth–Edwards Notation
256
Fractions
574
Happy Numbers
630
Happy Numbers (Long)
592
ISBN
605
Leap Years
740
Leyland Numbers
777
ln 2
900
Look and Say
610
Niven Numbers
582
Niven Numbers (Long)
591
Odious Numbers
906977
Odious Numbers (Long)
571968
Ordinal Numbers
534
Pascal’s Triangle
357
Pernicious Numbers
333
Pernicious Numbers (Long)
391
Prime Numbers
480
Prime Numbers (Long)
472
Recamán
576
Set
466
Spelling Numbers
318
United States
71
π
329
τ
313